Tried to open Object Properties in Explorer, it gives error:
Error Resolving Object: (XXXXBB)
This error happens for every objects in every tablespaces.
Bad Server-side Component installation.
1. Dropping all Space Manager Server-side object by doing this: File | Admin | Remove Space Manager Server Side Objects
2. Re-install Space Manager Server-side objects with a user with DBA Role. Do not use SYS or SYSTEM user. DBA must have EXECUTE on SYS.DBMS_SYS_SQL privilege.