Hello and welcome to the forums,
This is rather straightforward issue.
You need to make sure that the file ownership and group is the same as user accessing those scripts. Often the user for apache is www-data, group www-data, but you should check if it's the case on your server. Also make sure the file permissions are appropriate (755 should work alright for most configurations, even resolve the ownership issue).
I suggest you apply it to all files and folders in your epesi folder, since I can see there's some problems with css as well.
Kind regards,
Arek
