1. If you have implemented the steps for Installing the new Portalman in API Portal for CR3
and above at line 355 you will find JDBC connection
2. If this JDBC connection is broken you will see Error Code 500
3. From policy manager navigate to the JDBC connection local and click on test and see if it is working(most likely it will fail).
4. Check if the JDBC is pointing to the correct DB and has other properties are entered and set correctly.