Exception SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)::SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)

Exception thrown with message "SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)::SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)"

Stacktrace:
#7 Exception in /var/www/html/admin/libraries/utility.functions.php:204
#6 die_freepbx in /var/www/html/admin/libraries/BMO/Database.class.php:145
#5 PDOException in /var/www/html/admin/libraries/BMO/Database.class.php:140
#4 PDO:__construct in /var/www/html/admin/libraries/BMO/Database.class.php:140
#3 FreePBX\Database:__construct in /var/www/html/admin/libraries/BMO/FreePBX.class.php:71
#2 FreePBX:__construct in /var/www/html/admin/bootstrap.php:153
#1 require_once in /etc/freepbx.conf:11
#0 include_once in /var/www/html/admin/config.php:126