Hi @Ben_Katz,
So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Have there been any recent changes to your setup, including updates or new media added around the time this started occurring?
Just to verify, is Roon crashing when it tries to start up or are you given a login screen that doesn’t let you log in?