You can probably ignore the FireMotD errors. FireMotD just displays some system information when you ssh to the machine and doesn’t impact the functionality of anything else. I see those errors on the Ubuntu 20 VMs I’m running to.
But please use How to use code fences.
I’ve not seen that error before but it’s clearly complaining about a missing library which implies that there is something wrong with the Java install. I would not be surprised if it tried to install the ARM version of the JDK. You may not be able to do unattended for an Ubuntu VM on a non-arm machine and may need to manually choose the right Java from openhabian-config or, if there isn’t one, install Java yourself.