cnmaestro on-premises upgrade problems

Hi people, I have cnmaestro on-premises 2.1.1-r14 running normally under Citrix VM with about 10000 devices and everything is fine with 8 CPUs and 16GB RAM.

Now, I am trying to upgrade to 2.2.0 ova without success. I tried both through GUI and manual commands through CLI but the result is always the same, after the upgrade the server doesn't boot anymore. 

If I try to install the new 2.2.0 ova in a completely new VM the server boots into initframs and I am not able to do anything from there.

Anyone from cambium can give a hand here?

I have forwarded this to our support and product teams