good morning, unfortunately i’m having the same issue. no matter what I do, it always ends with this error 
:
root@mj-nextcloud01:~# nc-who
.. loading modules - nc/nextcloudPHP Warning: include(/config.php): Failed to open stream: No such file or directory in Standard input code on line 5
PHP Warning: include(): Failed opening '/config.php' for inclusion (include_path='.:/usr/share/php') in Standard input code on line 5
PHP Warning: Undefined variable $CONFIG in Standard input code on line 6
PHP Warning: foreach() argument must be of type array|object, null given in Standard input code on line 6
the user www-data definitely has write permissions to its home directory /var/www
the server is:
Linux mj-nextcloud01 5.15.0-136-generic #147-Ubuntu SMP Sat Mar 15 15:53:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
the nextcloud version is:
nextcloud Hub 10 (31.0.2)
what else can i try?