I have recently updated a test server from Jira 6.3.8 to 7.12.1 (Software and core) and installed then installed Service Desk 3.15.1 as well. When opening any Service Desk project the side bar does not load and an error appears saying "Loading sidebar is taking longer than usual. You can refresh the page to load it again." This error pops up immediately and refreshing does not fix the issue.
This happens for every project that has been designated as a Service Desk project. If I change the same project to a Software project or Business (Core) project the sidebar loads just fine.
I wanted to ask the community if there were any known solutions or ideas to fix this (I have tried searching) before I open a ticket with Atlassian. Thanks!
How the Side Bar appears:

The Error message:
