index.php broken?

[devTwitchiger]

Fatal error: Uncaught TypeError: error_reporting(): Argument #1 ($error_level) must be of type ?int, string given in C:\xampp\htdocs\sinusbot\index.php:3 Stack trace: #0 C:\xampp\htdocs\sinusbot\index.php(3): error_reporting('E_ERROR') #1 {main} thrown in C:\xampp\htdocs\sinusbot\index.php on line 3

Screenshot of index.php?

[devTwitchiger]

FIX
set line 2 or 3 to :
ini_set('display_errors', 1);
on every php file