I installed confluence5.6.5 version and created plugins but Iam unable to see the plugins in the UPM below error occurs
This version of Confluence is unrecognized by the Atlassian Marketplace. It might be a non-standard build or be too new to appear.
This can happen when the Atlassian Marketplace database is not updated to know about the new Confluence release. It's not a serious error, it just means that the add-on manager in Confluence is not able to check the plugins you have installed for compatibility with the version of Confluence you're running.
It's now been corrected and the warning message should be gone now.
As the same issue is persisting, can you share which version of UPM is being used? Also is there something related inside the please, atlassian-confluence.log <Confluence Home/logs>?
If this is becoming critical for you, I would suggest you to raise a new ticket through our Support Channel (https://support.atlassian.com) so we will have the engineers working to have it fixed and provide you the right directions to follow.
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