No data received / ERR_EMPTY_RESPONSE and no way to find the error
My Dev environment works fine.
Tried visiting test environment through some proxy sites, and some aren't loading anything, others only half the (home)page.
Login page also fails to load.
in my application/config/generated_overrides/concrete.php.
Caching is off.
Running version 188.8.131.52 of C5
How can I find out what the problem is? Are there any log files?