Hello, I have on php 7.0 which is default PHP version for my ISPConfig and run two Wordpress sites on it. I crated new website where I wanted to install another WP, but there is the catch. It gives me 500 error, whenever I want to access installation of wordpress. But php info works there fine, I dont know where it the problem.
add: to your wp-config.php file and try the site again, see if any errors show up in /wp-content/debug.log