Fatal error: Uncaught ArgumentCountError: mysqli_close() expects exactly 1 argument, 0 given in /home/sweater/public_html/youraccount/sign_out.php:7
Stack trace:
#0 /home/sweater/public_html/youraccount/sign_out.php(7): mysqli_close()
#1 {main}
thrown in /home/sweater/public_html/youraccount/sign_out.php on line 7