After going through the cloud connection wizard for an sftp connection (successfully), as a last step SolidExplorer requires the connection information to be encrypted, and asks for either a fingerprint or a password for your google account. After successfully authenticating with either, the same page stays up, with the big green box with the checkmark, and the "Previous" and "Finish" buttons. Clicking the "Finish" button again only brings up the authentication window again.