This just happened to me on my sonicTransporter i9 as well. In fact, this happened in 2 of the 3 times I updated HQPlayer recently. I ask Andrew at SGC about it and he had nothing to offer. No help…only suggested I contact Roon or Signalyst.
My solution, and the only one I tried that worked, is to use the sonicTransporter’s web interface to remove Roon and reinstall it. Then I restored the database from the most recent backup (I backup nightly).
EDIT: As soon as I change a filter setting, boom, it fails again…frustrating. Check out this thread: