Connect to repository (restore) from different computer


I am backing up files from main Windows PC to B2 without issues. I wanted to check that files can be restored from a different computer should the main one die. Using the GUI to connect from my windows laptop I receive an error: certificate signed by unknown authority. Using CLI with override host and user name produces same result. I searched the forum and see that the server is certified as How can I connect to the repository from a different computer?

(The laptop produces the same error when trying to create a new repository in a completely empty B2 bucket.) Any suggestions much appreciated.

Maybe something wrong with system time? incorrect time may break https connection.
Or try to connect to B2 with rclone?