Plugin does not enable due to Unable to enable web fragment error message
Platform Notice: Data Center - This article applies to Atlassian products on the Data Center platform.
Note that this knowledge base article was created for the Data Center version of the product. Data Center knowledge base articles for non-Data Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Symptoms
Confluence does not enable plugins. The following error appears in the atlassian-confluence.log for example when the Team Calendars for Confluence couldn't be enabled due the error but can happen to any other plugin as well.
[atlassian.plugin.manager.DefaultPluginManager] enableConfiguredPluginModule There was an error loading the descriptor 'Upcoming events in mail summary' of plugin 'com.atlassian.confluence.extra.team-calendars'. Disabling.
-- referer: xxxxxxxx | url: /rest/plugins/1.0/com.atlassian.confluence.extra.team-calendars-key | userName: xxxxxx
java.lang.RuntimeException: Unable to enable web fragment
Cause
1) This can occur due to the JRE or JDK being corrupted or using a rather old version.
2) Can also occur due to the old version of the plugin.
Resolution
For cause 1:
1) Reinstall the latest supported JDK for the current confluence version. See the supported platforms for your current confluence version.
2) Remove the plugin cache folders and restart the application.
3) Try to enable the plugin(s) again.
For cause 2:
1) Remove the old plugin version
2) Install the latest supported version of the plugin to your confluence version. See the plugin version history on market place for this information.
3) Try to enable the plugin(s) again.