Cannot add vault on SMB share created from Windows

[Michael]

Hi.
Does this help?

How to encrypt folders of a share from a NAS using Cryptomator? - Best practice

You can actually also use SMB. Go to the Files app. Select “Connect to Server” at the top right under the circular “…” button. Enter your SMB credentials. Go to Cryptomator. Use “Other File Provider” and select the SMB connection you’ve just added.