To make things clear: Cryptomator works on Big Sur. However, Cryptomator doesn’t work with Apple Silicon yet.
- WebDAV crashes because of an upstream bug in macOS, which should hopefully be fixed soon by Apple, see: https://github.com/cryptomator/cryptomator/issues/1419
- FUSE is not offered as an option, see: https://github.com/cryptomator/cryptomator/issues/1446
For emergency cases, please use Cyberduck, which has Cryptomator integration, to access your vaults.