Navigation menu not loading

SUGGESTED

Good day

My customer is on V12 P30 and Mongo 4.4.12

When the user logs into X3 and select the Navigation page, the navigation page is loading a blank page. This is also happening for users linked to the ADMIN functional profile. So far the only way we have been able to see the menu is to clear the browser cache, close browser and on the login screen select F5 multiple times. This is not always successful steps.

If anything comes to mind on how to resolve this issue, please let me know.

Thank you

Herman