I've followed all the instructions and the upgrade went well except for that all queues are gone!
When I click tickets -> queue view it's empty, no queues are showing at all. But if I put a new ticket in any of the queues then the queue is showing again and now with all the tickets in it. Anyone knows what the reason can be?
Also I think it's really slow even though I put the new installation on a new faster server in all aspects.
The new installation is on centos 7 with MariaDB 10.2