@Michael already pointed out where you can find an answer, you only need to look at it. But to provide a shortcut, see this post.
Regarding the crashes:
To access the vault content you are using the WebDAV integration. It relies on a OS implemenation and over the last two years we recieved a good amount of reports, that Apple provides buggy implementation, especially for M1 Macbooks (e.g. see Apple Silicon/M1 Chip: Crashes on WebDAV when altering files · Issue #1419 · cryptomator/cryptomator · GitHub or MacOS freezes when opening vault or handling file in the vault · Issue #2284 · cryptomator/cryptomator · GitHub). Only system updates and reports to Apple can solve those crashes.
There are two workarounds: