X3 Application Error - Function cannot be called in this context

SOLVED

When trying to access Fixed assets > Fixed assets > Assets, the user gets this error.  I got the same error when accessing Usage > Imports / exports > Imports, but I got this error after an import failed, and I tried to access the function again.

Does anyone know what causes this error? This is in version 7, Patch 8.

Your feedback will be greatly appreciated!