Hi @Ken_Talbot,
Thanks for the update! @MusicD is correct with the above; this is a known Qobuz issue upstream of Roon that our team is actively working on alongside Qobuz. Here is the tracking thread for this issue:
Is this occurring when accessing the same file? We can see from a fresh ROCK diagnostic file that the machine is simply running out of available RAM each time it crashes.
Have you considered increasing the RAM to 16GB?