Warning: mysqli_connect(): (HY000/2002): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /home/mvbc/public_html/inc/scripts.php on line 36

Warning: mysqli_error() expects parameter 1 to be mysqli, boolean given in /home/mvbc/public_html/inc/scripts.php on line 36
I cannot connect to the database because: