1.0.0-beta.2 error: "Failed to scan system volumes"

This matches my expectations as well.

Sorry this hit you: can you DM or email me the ā€œvolumesā€ table from your ā€œAbout PhotoStructureā€ page?

FWIW, I’m going to change PhotoStructure to not shut down when it finds these sorts of errors in the future, and make logs accessible via the UI as well.