I have transferred all data from one iPad to another (via Settings > General > Transfer or Reset iPad). On the new iPad, in the Files app, Cryptomator refuses to unlock the vault with the error message “Unable to perform unauthorized operation.”
In Cryptomator settings > Cloud Services > Dropbox > Authentications, I checked if I am signed in. I am. If I am signed in, why is there an authentication error?
I removed the vault from the Vault List and added it back. I allowed Cryptomator to access Dropbox. I am still not able to unlock the vault in Files.
Next, I signed out of Dropbox from within Cryptomator, then re-added the vault. I am still not able to unlock the vault in Files. This time, in Cryptomator I get the error message “The operation couldn’t be completed. (CryptomatorCommonCore.File-ProviderXPCConnectorError 4.)”.
I can unlock from the original iPad and also from another iPhone. So, there seems to be a bug specifically related to transferring entire systems between devices.