Which dokany version do you have installed. If not latest, please uninstall it and update it and Switch settings back to dokany and check if this has an impact.
These are the virtual file systems that are used by Cryptomator to provide the virtual drives.https://docs.cryptomator.org/en/latest/security/architecture/
Advantage of using dokany:
tl;dr: Use dokany if you’re not a power user. Otherwise i would suggest you try it out and if you see some crashes or other bugs regarding dokany, switch to the legacy adapter WebDAV.
The Advantage of using Dokany:
no max. file size limit of 4GB (due to the windows WebDAV client to provide access to your vault)
speed (depends, some user report that it is utterly slow on their machines)
higher system integration (your vault is mounted as a virtual drive, not as a network drive)
Risks: Crashes…
The error you are posting looks to me like there’s an issue either with the filesystem or with the hardware where the vault is located.