Steps to Reproduce
Create a new sys_app_application record named Test App.
Create only one sys_app_module under the Test App application of type Separator.
In the application navigator, click any other separator in other applications. Observe the separators in all applications are not functional.
Ensure that there is always another module type (for example, List of Records) accompanying the Separator module in any given application.
Related Problem: PRB670657