Debian 8
php 5.6.33
phpfpm
Virtualmin 6 (upgraded from 5.99)
If I change the php execution mode from PHPFPM to FCGId I got a:
Changing PHP execution mode to FCGId (run as virtual server owner) …
Failed to save website options : No PHP command found!
I suspect that the problem came up after the upgrade from 5.99 to 6. (I’ve done it updating the ATP repository)