Sites sharing folder isn't working on Mac OS X El Capitan

I have recently upgraded from 10.7.5 to 10.11.6 and have set up AMP. Although upon set up http://localhost did show a page with "It works!" message, now I get a forbidden message, but I can still run phpinfo.php from Sites folder as well as some other files stored in Sites directory. I have a username.conf file with

<Directory "/Users/username/Sites/">
AllowOverride All
Options Indexes MultiViews FollowSymLinks
Require all granted
</Directory>

and I have also the following in httpd.conf in Users username (my username here)

Group staff

What can be the problem and how can I solve it? Please, note that I am just learning and I am not an expert or a pro. Thank you very much!