In your case it doesn’t fails, it is just canceled by us, read more:
No this is “normal” and is due to the fact that during the normal unlock of a vault from the vault list, we load the masterkey file from the cloud in the background while entering the password or biometric credentials. As already described in the other thread, this first request will refresh the token of Onedrive, which requires UI and which is why we have to close the biometric auth dialog again. Somehow your device has a problem with closing the biometric auth dialog. Is it possible sometimes…
If the biomatric auth dialog isn’t cancelable on a device like @anon59756123 ’s new device, you can disable the preloading of the masterkey.cryptomator-file which will be available in 1.5.10 soon:
Thanks for the clarification.
It seems that closing the biometric auth dialogue silently failes sometimes on your device. Unfortunately, we can’t do more than asking the OS to close it. The only thing we could do is to optionally disable the prepare unlock via the settings so that when it is deactivated, it first authenticates via biometrics and when finished we communicate with onedrive. But that’s not really nice either because the unlock will take longer and we have to implement this extra, …