It looks like this was fixed in https://github.com/beetbox/beets/pull/3621
- Bug#964245: beets: Crashes on launch after upgr... Ben Morris
- Bug#964245: (no subject) Edward Shornock
- Bug#964245: patch from pull request Edward Shornock
- Bug#964245: marked as pending in beets Stefano Rivera
- Processed: Bug#964245 marked as pending in... Debian Bug Tracking System
- Bug#964245: marked as done (beets: Crashes... Debian Bug Tracking System
