Hello, maybe someone can help me. My Nextcloud 11 is with a host on the server, therefore, only limited access. Since the transition to PHP 7.0, Nextcloud no longer works. The following messages:
External server error
Bad gateway
Both messages appear alternately with the settings.
Nextcloud itself is compatible with php 7.0. Bad gateway and external server error could indicate a configuration issue on the webserver, you need to check your server or ask your hosting provider to solve this problem.