Hi @wizkid
I had the same issue.
I fixed it by adding the line “apc.enable_cli=1” to my /etc/php/7.4/cli/conf.d/20-apcu.ini. (See NC 21 - No OCC Output after upgrade - #2 by tflidd). Working fine now.
I had also tried to remove ‘memcache.local’ => ‘\OC\Memcache\APCu’, from Netxcloud config (See OOM when running occ db:add-missing-indices after upgrade to NC 21 - #4 by Dampfklon). It worked but then I was getting a warning saying it would be better to have a cache enabled. So I rolled that change back.