Base tables of type & not permitted

What causes this issue?

Only certain types of base tables are valid for certain types of
views. In particular, only transparent tables may be used as the base
tables of database views.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Remove the invalid base tables from the view.

Error message extract from SAP system. Copyright SAP SE.