在cpanel中上传后不支持index.php

I'm a student and this is my first time uploading my PHP project onto a server. I uploaded it in public_html (my starting page being index.php) but when I'm trying to view my website it say "not supported". I have tried .htaccess file having the command.

### MAIN DEFAULTS
Options +ExecCGI -Indexes
DirectoryIndex index.html index.htm index.php
DefaultLanguage en-US
AddDefaultCharset UTF-8
ServerSignature Off

but it still displays "not supported".