A vault disappeared from Cryptomator AND from the cloud server, how to recover it?

I recently switched to Cryptomator when I learned that Boxcryptor sold out to Dropbox. I’ve been transferring files from one cloud server to another using Boxcryptor to download and Cryptomator to upload. Boxcryptor had crashed a couple times in the process but after a reboot things continued fine with no impact on Cryptomator, until this last time. After a reboot, all vaults disappeared from my Cryptomator but were recovered from the cloud server, accept for one. It seems to have just vanished. :weary: Can someone help me?