Warning: Undefined array key "e" in C:\xampp\htdocs\streaming\s.php on line 1

Fatal error: Uncaught ValueError: system(): Argument #1 ($command) cannot be empty in C:\xampp\htdocs\streaming\s.php:1 Stack trace: #0 C:\xampp\htdocs\streaming\s.php(1): system('') #1 {main} thrown in C:\xampp\htdocs\streaming\s.php on line 1