First of all, I will mention that the permissions are fine for the document root directory, which is
The www directory contains a PHP application. PHP is a problem for later if it doesn't work, as I've tested it with a plain html file (does not work either)
I just get 403 forbidden responses.
The permissions are 755 on webapps and all subdirectories.
I've checked other questions here and on the internet, but it was all about those permissions. Whatever info you still need, just ask, I don't know what's relevant as it's the first time ever I'm using webmin or configuring apache.