Core Shell / Tunnel 2.5 is available for upgrading, it fixed an issue could leads empty profile list on macOS Big Sure Beta. Release notes:
As of macOS Big Sur Beta 8, a potential bug of system UserNotificationCenter.app of AppKit framework could prevent Core Shell/ Tunnel prompt user for passwords/passphrases.
We've filed a bug report to Apple, and there are lots of similar reports already sitting there. Before Apple comes to a conclusion, we recommend you use passphrase-less public-key authentication or ssh-agent to log into your host.