Despite the postfix server starting at boot and active, no local mail is delivered.

mailq command outputs loads of entries like...

0F8B1665B0 701 Wed May 5 19:53:02 root
root

...and there log entries like these...
postfix/cleanup[3433]: warning: hash:/etc/postfix/sender_canonical is unavailable. unsupported dictionary type: hash
postfix/cleanup[3433]: warning: hash:/etc/postfix/sender_canonical lookup error for "root@localhost"
postfix/cleanup[3433]: warning: 97E86665CF: canonical_maps map lookup problem for root@localhost -- message not accepted, try again later
postfix/cleanup[3433]: warning: 97E86665CF: sender_canonical_maps map lookup problem for root@localhost -- message not accepted, try again later
postfix/cleanup[3433]: warning: hash:/etc/postfix/canonical is unavailable. unsupported dictionary type: hash
postfix/cleanup[3433]: warning: hash:/etc/postfix/canonical lookup error for "root@localhost"
postfix/pickup[1276]: warning: maildrop/9CD2A660F0: error writing 97E86665CF: queue file write error

Tried web searching for these warnings above, but did not find any explanation or solution.

/etc/postfix/main.cf configs seemingy related are as such...
canonical_maps = hash:/etc/postfix/canonical
relocated_maps = hash:/etc/postfix/relocated
sender_canonical_maps = hash:/etc/postfix/sender_canonical

When looking at the contents of /etc/postfix/canonical and /etc/postfix/relocated, they strangely seem to be man page content, though that is also the case on another machine that delivers mail just fine.

Have all latest system updates, and tried rebooting, but no avail.

Running opensuse tumbleweed kernel 5.12.2-1-default, and postfix version 3.5.10 release 1.2.

What do you advise, to diagnose this and get local mail working?

Thank you