Unable to run the install.php file correctly

Hi Guys,

Everything is in the title, I can’t open the install.php file in a browser correctly. First, I tried directly from my file manager in cPanel, but it showed me a weird page titled “Error: PHP is not running” followed by things that look to me like functions (I know nothing about PHP). I use a web hosting service called GreenGeeks and the PHP version is 7.4.9 and MySQL version is 15.1 Distrib 10.3.24-MariaDB. I then tried using a web browser to point to my website using the following url: http://example.com/wordpress/wp-admin/install.php, but I got a “404 Not Found” error. Since my wordpress folder is under /public_html/wordpress/* I then tried with http://example.com/public_html/wordpress/wp-admin/install.php, but I got the same error. Therefore, I guess that my website is not online, but I don’t even know how do so… I don’t know what to put my mind on anymore… The famous “5 minutes installation” is a “memorable 48 hours installation” for me now… If anyone could help me it would be much appreciated.

Thank you everyone in advance