It seems that Apple and their auto app update has caused you this problem. Not Roon. Simply disabling auto app updates would be wise for all software/app to avoid situations like these.
I’m sorry you’ve got this going on now with everything that is happening. But, Roon did communicate and there are posts and guides in the FAQ.
Others have had the same issue and they have fixed it by downloading the legacy version.
See here:
Take some time out and come back to this when you’re ready. And, remember to the the guide!!