Hi Jones,
I guess the first question to answer is, is there an issue with that PHP script in particular, or with executing any PHP script from your folder. You could try uploading another file called hello_world.php in the same folder with this content:
<!DOCTYPE html>
<html>
<head>
<title>Hello, World! Page</title>
</head>
<body>
<?php
echo 'Hello, World!';
?>
</body>
</html>
Then, if you also get a 500 error when visiting https://userpage.fu-berlin.de/jonesanam/audios/hello_world.php it means there is an issue with how PHP and PHP permissions are configured regarding your folder. Unfortunately, if that turns out to be true, and your IT cannot assist you, I’m afraid I won’t be of much help either
If you see “Hello World,” we’d have to determine where in the PHP code the problem comes from
Jeremy