Cannot enable Team Calendar

Question

I'm using Confluence in a stand-alone server. Recently I upgraded confluence from 4.3 to 5.1.3, and I found Team Calendar Plugin disabled. When I try to enable it, it shows:

The add-on has been installed but cannot be enabled. Please refer to the logs for more information.

My license is valid and version is recent(3.2.2). I tried to delete cache and restart the daemon, but it didn't work.

Is there any way to resolve this problem?

hsuhailah · Accepted Answer

Possibly, it got timed out and then disabled. Try to increase the plugin timeout interval and manually re-enable the plugin from the database in case it is flagged as false in the database. You can refer to the workaround #2 and #3 in this document for details.