ORA-00257: archiver error
You should purge the archived logs with RMAN:

RMAN&gt; delete archivelog &lt;delete conditions here&gt;;
RMAN&gt; crosscheck archivelog all;


or alternatively all of them:

RMAN&gt;delete archivelog all;


You can check your recovery area usage like this:

SQL&gt;select * from v$flash_recovery_area_usage;


If you encountered that problem though, you will very likely encounter it again. Purging the archived logs is a quick fix.

Whoever maintains the server needs to verify:


That archived logs backups are performed and are successful
That obsolete archived logs are deleted
That obsolete backups are deleted.
If the backups are performed regularly and obsolete archived logs deleted, maybe the database usage has increased and filling the fast recovery area faster than the archived logs get backed up. Increasing the db_recovery_file_dest_size parameter to a higher value to fit the business needs may be required.