Steps to reproduce

1. Make config file write protected
2. Visit Nextcloud main page

Expected behaviour

The server should return status code 500 to alert standard monitoring systems. (Or ignore, that the config is not writeable)

Actual behaviour

The server returns status code 200

Server configuration

Operating system:
Debian

Web server:
Apache 2

Database:
Postgresql

PHP version:
5.6

Nextcloud version: (see Nextcloud admin page)
12