URLs with "login.giata.io" are for one-time use only, and will not grant you continued access to the DRIVE platform.
The correct and permanent URL for GIATA DRIVE is https://hotelier.mygiata.com/ (it can be found in the Onboarding email). This URL will redirect you to a login page if you are not already logged in. You cannot save the URL of the login page "login.giata.io...." and reuse it later again.
The login challenge URL that you are trying to use might be old and already used. The "login.giata.io" URLs are for one-time use only.