I had the same problem, and it was fixed running:
sudo aa-complain mysqld sudo aa-complain mysqld-akonadi sudo /etc/init.d/apparmor reload akonadictl start
I had the same problem, and it was fixed running:
sudo aa-complain mysqld d/apparmor reload
sudo aa-complain mysqld-akonadi
sudo /etc/init.
akonadictl start