Did you look at the folders mentioned there ?
You need to fix those before you rerun the update process.
Additionally redis is not running :
File “/omd/sites/site/lib/python3.9/site-packages/redis/connection.py”, line 563, in connect
raise ConnectionError(self._error_message(e))
redis.exceptions.ConnectionError: Error 2 connecting to unix socket: /omd/sites/site/tmp/run/redis. No such file or directory.
Take a look at ~/var/log/redis-server.log to see what is happening there.
May be a problem related to the first one, may be not.