AWS S3 backup pg_dumpall server version mismatch issue

Hello, dear all.
We’re trying to configure an operator’s backup to s3 bucket and getting the following error when the job is started:

2021-06-28 12:36:06 ==> Starting backup
server version: 13.3; pg_dumpall version: 9.6.20
aborting because of server version mismatch

KC installed using the external PostgreSQL DB v13.
KC operator is latest.
KC version is 14.0

In addition, is it possible to use MinIO instead of AWS? Because I cannot see any example of endpoint?

Thank you,