A PostgreSQL backup can fail with the following errors:
Launching backup command : '[pg_dump command]'
Database found, but failed to backup Database '[database name]' .
No data/items are saved in the media.
There are 3 common scenarios where this problem can occur.
For the above causes:
If the above 3 scenarios do not help to resolve the problem, then please contact PostgreSQL support with the errors reported by the pg_dump command from the prompt/terminal session.