Yeah. The other possibility is that your Roon database has some kind of corruption that is preventing Roon Server from starting. The solution for that is to shutdown Roon Server, move the database folder out of the way, and then restart it.
This article describes where to find the database folder:
If that works, you can try restoring one of your database backups. If you’ve not been running Roon for long, it may be easier to just let it re-analyze your music collection and start fresh.
The good news is that improvements in builds 880 and later should prevent this from happening again.