Will continue debugging later

templates/Nextcloud/Resources/nginx.conf

@@ -57,6 +57,10 @@ http {
     # This module is currently not supported.
     #pagespeed off;
 
+#   Will test later
+#   error_page 403 /core/templates/403.php;
+#   error_page 404 /core/templates/404.php;
+
     location / {
         rewrite ^ /index.php$request_uri;
     }
@@ -67,6 +71,7 @@ http {
     location ~ ^/(?:\.|autotest|occ|issue|indie|db_|console) {
         deny all;
     }
+############################################################################################################################### Suspected current issue location
     location ~ ^/(?:index|remote|public|cron|core/ajax/update|status|ocs/v[12]|updater/.+|ocs-provider/.+)\.php(?:$|/) {
         fastcgi_split_path_info ^(.+?\.php)(/.*)$;
         include fastcgi.conf;