I would not treat the query not mapped line as the root cause yet.
The more likely issue is that the combo box cannot actually retrieve visible GenAICommons.InputModality objects at runtime.
I would check two things first:
The easiest way to verify this is to create a temporary page with a data grid 2 on GenAICommons.InputModality and open it with the same user role.
If the grid is empty, this is likely a security issue.
If the grid shows records, then the problem is more likely in the widget/page setup.