The Application Navigator shows the loading circle spinning and fails to load the page. No error message is provided on the UI to be able to determine the reason for the load failure, unless the user keeps the browser console open to trace errors on the page.
Steps to Reproduce
1) Login a Madrid instance.
2) Type sys_app_module.list in the filter navigator and press Enter.
3) Open an application module that has link type 'URL (from Arguments:)', for example 'Problem Properties'.
4) Type a malformed single '%' separator character into the URL, instead of '%20', for example between Problem and Management:
5) Go to the homepage and refresh. Notice the Application Navigator goes into a loop, showing the loading circle spinning, and failing to reload the page.
This problem has been fixed. If you are able to upgrade, review the Fixed In or Intended Fix Version fields to determine whether any versions have a planned or permanent fix.
Related Problem: PRB1324918