Fatal error: Maximum execution time of 30 seconds exceeded

Open php.ini
set: max_execution_time=300

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock'

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock'

Solution:
sudo service mysql stop
sudo /etc/init.d/apparmor reload
sudo service mysql start