My domain is www.madhusudanmishra.in. All index.php files are working fine but when files which have to make connection with the database are called it shows error 500. For eg: www.madhusudanmishra.in/register is working fine but when someone tries to make a login attempt (file signin.php works) and shows error 500. All php file permissions are set to 644 as well as db user has all privilege given. The same works fine on the localhost xampp. Please help and thanks in advance.