Somehow the shell is back online again, by it’s own will. Iḿ logged as admin.
The shell for the user admin is /usr/bin/zsh
I for user andre is /usr/sbin/nologin.
Both with Sharing Admin, Full Admin, Has Allow List roles.
Just logged out from admin and logged as andre. Back to black screen, Logged as admin again and about a minute later the shell works.
So I just found out how to configure the shell for each users under credentials…one more thing learned in TNas, thanks to you all…now, should I live it as zsh or better live as TrueNAs CLI?