hey donald… i was asking more in general… b/c there are bazillion ways to run nc in myriads environments. so whenever possible pls don’t hesitate to post as much details as possible. best would be if you’d install app “issue template” and post it’s output here with every issue you face.
as for your latest error: you now are running a rc (aka still beta) software. could be a possible bug… could be something else. i really don’t know. not enough information about your environment ( see above 
)
but there are similar issues in the forum… maybe you wanna check them out?
→ Warning: PHP Opcache not properly configured
→ Nextcloud 12 Beta 2 PHP Opcache is not properly configured