Failed to connect to MySQLi: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)Not connected to DatabaseSQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)table error121: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)