After upgrade to 4.3, documentation theme is present, but does not work.
It cannot be deleted because it is an system plugin. When I tried to install again, it gives the following error.
What is wrong? How can I fix it?
Can you confirm that all spaces using the Documentation theme are not working? The error you presented seems to be related to the UPM. Can you also confirm your Confluence Admin > General Configuration > Server Base URL is correctly set to the one you use to access Confluence?
Thanks Bahar. Please try removing everything under the following directories:
This will remove all bundled plugins from your instance, this will help us discarding broken plugins. After you finish it please restart Confluence so the plugins can be re-generated.
If the issue persists, you can consider raising a support ticket at href="https://support.atlassian.com%20">https://support.atlassian.com for further assistance.
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