Advanced Roadmaps Plans are showing the error "Something went wrong" when viewing them
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
Summary
All Plans from Advanced Roadmaps for Jira are showing the error below when viewing them:
Something went wrong
'Wait a few seconds, then try again. If this keeps happening, let us know at https://support.atlassian.com/contact 
Environment
Jira Data Center on any version from 9.0.0
Diagnosis
- When clicking on the View Logs button from the error pop-up, the error below is shown:
Stack Trace Uncaught SyntaxError: Function statements require a function name SyntaxError: Function statements require a function name - There is some Javascript included in the Announcement banner configured in the page ⚙ > System > Announcement banner
- The error goes away after removing this announcement banner
Cause
The announcement banner contains some custom Javascript code that is preventing the Plan from loading properly and that is causing the error shown in the UI.
Solution
Remove the script from the announcement banner.