Oracle Solution for Error ora-16819

Solution for Oracle Error ORA-16819

ORA-16819: fast-start failover observer not started

What triggered the Error:

The observer for fast-start failover was not started. As a result, fast-start failover could not happen in the case of a primary database failure.

What should we do to fix it:

Start the fast-start failover observer by using, for example, the DGMGRL START OBSERVER command.