Accessing object using dblink Within PL/SQL Fails (lower to higher version)

Hi all,

We've some issues with dblink from 11g database (primary) to 19c database (physical standby read only)

1. When accessing table from physical standby read only (19c) on primary 11g using dblink within PL/SQL Fails with [Error] ORA-04063 table has errors
2. When accessing function from physical standby read only (19c) on primary 11g using dblink withing PL/SQL Fails with [Error] ORA-06575 Package or function is in an invalid state

There is no problem while we are using the same version databases

Please advice

Thanks,

Iqbal