# Issue with OpenRefine Wikimedia Commons extension

**URL:** <https://forum.openrefine.org/t/issue-with-openrefine-wikimedia-commons-extension/2531>\
**Category:** Support and Helpdesk\
**Tags:** wikimedia-commons\
**Created:** [September 4, 2025, 12:27am UTC](https://forum.openrefine.org/t/issue-with-openrefine-wikimedia-commons-extension/2531 "2025-09-04T00:27:10Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![ConBo](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.openrefine.org/conbo/32/1678_2.png) [@ConBo](https://forum.openrefine.org/u/ConBo)\
**Post date:** [September 4, 2025, 8:08am UTC](https://forum.openrefine.org/t/issue-with-openrefine-wikimedia-commons-extension/2531/2 "2025-09-04T08:08:55Z")

</div>

I tried it too and have the same problem. It starts with not being able to show a preview of the data abd then seems to try to load forever. I had to aboard the process.  
I am not firm with the code, but the error messages seem to be similiar to the login problem we had with wikibase. Might that be an extension of [this problem](https://forum.openrefine.org/t/invalid-credentials-message-from-wikidata/2404)?

Here is the code I got from OR

> 09:56:44.322 [..monsImportingController] doPost::CommonsServiceException::{} (656ms)  
> java.io.UncheckedIOException: com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'Please': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')  
> at [Source: REDACTED (StreamReadFeature.INCLUDE\_SOURCE\_IN\_LOCATION disabled); line: 1, column: 7]  
> at org.openrefine.extensions.commons.importer.FileFetcher.(FileFetcher.java:36)  
> at org.openrefine.extensions.commons.importer.FileFetcher.fetchCategoryMembers(FileFetcher.java:88)  
> at org.openrefine.extensions.commons.importer.FileFetcher.fetchDirectFileMembers(FileFetcher.java:99)  
> at org.openrefine.extensions.commons.importer.FileFetcher.listCategoryMembers(FileFetcher.java:127)  
> at org.openrefine.extensions.commons.importer.CommonsImporter.parse(CommonsImporter.java:107)  
> at org.openrefine.extensions.commons.importer.CommonsImporter.parsePreview(CommonsImporter.java:45)  
> at org.openrefine.extensions.commons.importer.CommonsImportingController.doParsePreview(CommonsImportingController.java:148)  
> at org.openrefine.extensions.commons.importer.CommonsImportingController.doPost(CommonsImportingController.java:79)  
> at com.google.refine.commands.importing.ImportingControllerCommand.doPost(ImportingControllerCommand.java:69)  
> at com.google.refine.RefineServlet.service(RefineServlet.java:187)  
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:750)  
> at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1410)  
> at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)  
> at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:529)  
> at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131)  
> at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:578)  
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)  
> at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223)  
> at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1570)  
> at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131)  
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)  
> at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:790)  
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)  
> at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223)  
> at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1384)  
> at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)  
> at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)  
> at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1543)  
> at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)  
> at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1306)  
> at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)  
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)  
> at com.google.refine.ValidateHostHandler.handle(ValidateHostHandler.java:93)  
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)  
> at org.eclipse.jetty.server.Server.handle(Server.java:563)  
> at org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598)  
> at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753)  
> at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501)  
> at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:282)  
> at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)  
> at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)  
> at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)  
> at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)  
> at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)  
> at java.base/java.lang.Thread.run(Unknown Source)  
> Caused by: com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'Please': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')  
> at [Source: REDACTED (StreamReadFeature.INCLUDE\_SOURCE\_IN\_LOCATION disabled); line: 1, column: 7]  
> at com.fasterxml.jackson.core.JsonParser.\_constructError(JsonParser.java:2584)  
> at com.fasterxml.jackson.core.JsonParser.\_constructReadException(JsonParser.java:2610)  
> at com.fasterxml.jackson.core.JsonParser.\_constructReadException(JsonParser.java:2618)  
> at com.fasterxml.jackson.core.base.ParserMinimalBase.\_reportError(ParserMinimalBase.java:825)  
> at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.\_reportInvalidToken(ReaderBasedJsonParser.java:3017)  
> at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.\_handleOddValue(ReaderBasedJsonParser.java:2051)  
> at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.nextToken(ReaderBasedJsonParser.java:780)  
> at com.fasterxml.jackson.databind.ObjectMapper.\_readTreeAndClose(ObjectMapper.java:4946)  
> at com.fasterxml.jackson.databind.ObjectMapper.readTree(ObjectMapper.java:3281)  
> at org.openrefine.extensions.commons.importer.FileFetcher.getCallResults(FileFetcher.java:57)  
> at org.openrefine.extensions.commons.importer.FileFetcher.(FileFetcher.java:34)  
> ... 44 more  
> 09:57:18.650 [refine] POST /command/core/importing-controller (34327ms)  
> Exception in thread "Thread-1" java.io.UncheckedIOException: com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'Please': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')  
> at [Source: REDACTED (StreamReadFeature.INCLUDE\_SOURCE\_IN\_LOCATION disabled); line: 1, column: 7]  
> at org.openrefine.extensions.commons.importer.FileFetcher.(FileFetcher.java:36)  
> at org.openrefine.extensions.commons.importer.FileFetcher.fetchCategoryMembers(FileFetcher.java:88)  
> at org.openrefine.extensions.commons.importer.FileFetcher.fetchDirectFileMembers(FileFetcher.java:99)  
> at org.openrefine.extensions.commons.importer.FileFetcher.listCategoryMembers(FileFetcher.java:127)  
> at org.openrefine.extensions.commons.importer.CommonsImporter.parse(CommonsImporter.java:107)  
> at org.openrefine.extensions.commons.importer.CommonsImportingController$1.run(CommonsImportingController.java:212)  
> Caused by: com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'Please': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')  
> at [Source: REDACTED (StreamReadFeature.INCLUDE\_SOURCE\_IN\_LOCATION disabled); line: 1, column: 7]  
> at com.fasterxml.jackson.core.JsonParser.\_constructError(JsonParser.java:2584)  
> at com.fasterxml.jackson.core.JsonParser.\_constructReadException(JsonParser.java:2610)  
> at com.fasterxml.jackson.core.JsonParser.\_constructReadException(JsonParser.java:2618)  
> at com.fasterxml.jackson.core.base.ParserMinimalBase.\_reportError(ParserMinimalBase.java:825)  
> at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.\_reportInvalidToken(ReaderBasedJsonParser.java:3017)  
> at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.\_handleOddValue(ReaderBasedJsonParser.java:2051)  
> at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.nextToken(ReaderBasedJsonParser.java:780)  
> at com.fasterxml.jackson.databind.ObjectMapper.\_readTreeAndClose(ObjectMapper.java:4946)  
> at com.fasterxml.jackson.databind.ObjectMapper.readTree(ObjectMapper.java:3281)  
> at org.openrefine.extensions.commons.importer.FileFetcher.getCallResults(FileFetcher.java:57)  
> at org.openrefine.extensions.commons.importer.FileFetcher.(FileFetcher.java:34)  
> ... 5 more  
> 09:57:19.013 [refine] POST /command/core/importing-controller (363ms)  
> 09:57:19.113 [..monsImportingController] doPost::CommonsServiceException::{} (100ms)  
> java.io.UncheckedIOException: com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'Please': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')  
> at [Source: REDACTED (StreamReadFeature.INCLUDE\_SOURCE\_IN\_LOCATION disabled); line: 1, column: 7]  
> at org.openrefine.extensions.commons.importer.FileFetcher.(FileFetcher.java:36)  
> at org.openrefine.extensions.commons.importer.FileFetcher.fetchCategoryMembers(FileFetcher.java:88)  
> at org.openrefine.extensions.commons.importer.FileFetcher.fetchDirectFileMembers(FileFetcher.java:99)  
> at org.openrefine.extensions.commons.importer.FileFetcher.listCategoryMembers(FileFetcher.java:127)  
> at org.openrefine.extensions.commons.importer.CommonsImporter.parse(CommonsImporter.java:107)  
> at org.openrefine.extensions.commons.importer.CommonsImporter.parsePreview(CommonsImporter.java:45)  
> at org.openrefine.extensions.commons.importer.CommonsImportingController.doParsePreview(CommonsImportingController.java:148)  
> at org.openrefine.extensions.commons.importer.CommonsImportingController.doPost(CommonsImportingController.java:79)  
> at com.google.refine.commands.importing.ImportingControllerCommand.doPost(ImportingControllerCommand.java:69)  
> at com.google.refine.RefineServlet.service(RefineServlet.java:187)  
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:750)  
> at org.eclipse.jetty.servlet.ServletHolder$NotAsync.service(ServletHolder.java:1410)  
> at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)  
> at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:529)  
> at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131)  
> at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:578)  
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)  
> at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223)  
> at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1570)  
> at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131)  
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)  
> at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:790)  
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)  
> at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223)  
> at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1384)  
> at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)  
> at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)  
> at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1543)  
> at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)  
> at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1306)  
> at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)  
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)  
> at com.google.refine.ValidateHostHandler.handle(ValidateHostHandler.java:93)  
> at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)  
> at org.eclipse.jetty.server.Server.handle(Server.java:563)  
> at org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598)  
> at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753)  
> at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501)  
> at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:282)  
> at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)  
> at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)  
> at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)  
> at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)  
> at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)  
> at java.base/java.lang.Thread.run(Unknown Source)  
> Caused by: com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'Please': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')  
> at [Source: REDACTED (StreamReadFeature.INCLUDE\_SOURCE\_IN\_LOCATION disabled); line: 1, column: 7]  
> at com.fasterxml.jackson.core.JsonParser.\_constructError(JsonParser.java:2584)  
> at com.fasterxml.jackson.core.JsonParser.\_constructReadException(JsonParser.java:2610)  
> at com.fasterxml.jackson.core.JsonParser.\_constructReadException(JsonParser.java:2618)  
> at com.fasterxml.jackson.core.base.ParserMinimalBase.\_reportError(ParserMinimalBase.java:825)  
> at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.\_reportInvalidToken(ReaderBasedJsonParser.java:3017)  
> at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.\_handleOddValue(ReaderBasedJsonParser.java:2051)  
> at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.nextToken(ReaderBasedJsonParser.java:780)  
> at com.fasterxml.jackson.databind.ObjectMapper.\_readTreeAndClose(ObjectMapper.java:4946)  
> at com.fasterxml.jackson.databind.ObjectMapper.readTree(ObjectMapper.java:3281)  
> at org.openrefine.extensions.commons.importer.FileFetcher.getCallResults(FileFetcher.java:57)  
> at org.openrefine.extensions.commons.importer.FileFetcher.(FileFetcher.java:34)  
> ... 44 more  
> 09:57:22.542 [refine] POST /command/core/get-importing-job-status (3428ms)  
> 09:57:23.548 [refine] POST /command/core/get-importing-job-status (1006ms)  
> 09:57:24.550 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:25.553 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:26.555 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:27.563 [refine] POST /command/core/get-importing-job-status (1007ms)  
> 09:57:28.696 [refine] POST /command/core/get-importing-job-status (1133ms)  
> 09:57:29.699 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:30.716 [refine] POST /command/core/get-importing-job-status (1016ms)  
> 09:57:31.718 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:32.720 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:33.723 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:34.726 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:35.828 [refine] POST /command/core/get-importing-job-status (1102ms)  
> 09:57:36.831 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:37.833 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:38.836 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:39.838 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:40.841 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:41.843 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:42.845 [refine] POST /command/core/get-importing-job-status (1001ms)  
> 09:57:43.848 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:44.851 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:45.853 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:46.855 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:47.858 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:48.877 [refine] POST /command/core/get-importing-job-status (1019ms)  
> 09:57:49.880 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:57:50.892 [refine] POST /command/core/get-importing-job-status (1012ms)  
> 09:57:51.892 [refine] POST /command/core/get-importing-job-status (999ms)  
> 09:57:52.896 [refine] POST /command/core/get-importing-job-status (1004ms)  
> 09:57:53.897 [refine] POST /command/core/get-importing-job-status (1000ms)  
> 09:57:54.897 [refine] POST /command/core/get-importing-job-status (1000ms)  
> 09:57:55.903 [refine] POST /command/core/get-importing-job-status (1005ms)  
> 09:57:56.914 [refine] POST /command/core/get-importing-job-status (1010ms)  
> 09:57:57.914 [refine] POST /command/core/get-importing-job-status (1000ms)  
> 09:57:58.915 [refine] POST /command/core/get-importing-job-status (1000ms)  
> 09:57:59.925 [refine] POST /command/core/get-importing-job-status (1010ms)  
> 09:58:00.931 [refine] POST /command/core/get-importing-job-status (1005ms)  
> 09:58:01.931 [refine] POST /command/core/get-importing-job-status (1000ms)  
> 09:58:02.937 [refine] POST /command/core/get-importing-job-status (1005ms)  
> 09:58:03.942 [refine] POST /command/core/get-importing-job-status (1005ms)  
> 09:58:04.953 [refine] POST /command/core/get-importing-job-status (1010ms)  
> 09:58:05.964 [refine] POST /command/core/get-importing-job-status (1011ms)  
> 09:58:06.980 [refine] POST /command/core/get-importing-job-status (1015ms)  
> 09:58:07.993 [refine] POST /command/core/get-importing-job-status (1012ms)  
> 09:58:08.996 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:58:10.009 [refine] POST /command/core/get-importing-job-status (1013ms)  
> 09:58:11.024 [refine] POST /command/core/get-importing-job-status (1015ms)  
> 09:58:12.038 [refine] POST /command/core/get-importing-job-status (1014ms)  
> 09:58:13.046 [refine] POST /command/core/get-importing-job-status (1007ms)  
> 09:58:14.048 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:58:15.063 [refine] POST /command/core/get-importing-job-status (1014ms)  
> 09:58:16.079 [refine] POST /command/core/get-importing-job-status (1016ms)  
> 09:58:17.081 [refine] POST /command/core/get-importing-job-status (1001ms)  
> 09:58:18.082 [refine] POST /command/core/get-importing-job-status (1001ms)  
> 09:58:19.088 [refine] POST /command/core/get-importing-job-status (1005ms)  
> 09:58:20.104 [refine] POST /command/core/get-importing-job-status (1015ms)  
> 09:58:21.103 [refine] POST /command/core/get-importing-job-status (999ms)  
> 09:58:22.106 [refine] POST /command/core/get-importing-job-status (1002ms)  
> 09:58:23.108 [refine] POST /command/core/get-importing-job-status (1002ms)

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