Hey
Here is the exact commands to set the proper permissions
find . -type d -not -perm 2755 -exec chmod 2755 {} \;
find . -type f -not -perm 0644 -exec chmod 0644 {} \;
find . ! -user www-data -exec chown www-data:www-data {} \;
chmod +x bin/console
These commands should be run (in your case) in the public_html folder
While as pgr pointed out your webserver root for SuiteCRM Should be the public_html/public folder