should install the missing packages (assuming they are in the version of Xubuntu you are running). What version of DoM and Xubuntu are you using at the moment?
I tried that, and all it did was remove dcpomatic from the system (it assumed that was the only thing broken).
I'm on Xubuntu 20.10, and I was trying to install the Ubuntu 20.10 64-bit from the downloads page. Still not entirely sure how DoM got removed in the first place, but I'm assuming some or all of these dependencies got removed in one of the upgrades, probably from 20.04 --> 20.10.
That's strange; I just tried installing 2.14.48 on a Ubuntu 20.10 VM and `apt-get -f install` seemed to work OK. Can you post the output of `apt-get -f install` when you try it?