Currently I am running ArcMap 10.6.1 and try to connect with an Oracle 19c database. Unfortunately I only see "Unknown Error":
Underlying DBMS error[Unknown errorNo extended error.]
I am also able to connect with the database using sqlplus via cmd and a tnsping from cmd also works just fine on the relevant port.
Are there any suggestions where I could find a log and does anyone know about a fix of this issue?