fcgi - fpm file not found - php not working

Hi all,

On a new installation of virtualmin/debian, imported 4 domains from same version/centos7 server if that matters.

Some sites have fcgi enabled and working while one fpm. If I switch the site that use fcgi to fpm I get a file not found and php is not parsing at all.
Same on the other site that use fpm. If I switch it to fcgi get same error.

Any help is much appreciated.