Access to collaborators who select 'Skip for now' when logging in

I’ve recently noticed that Kami isn’t allowing my students who select ‘skip for now’ on the login page to see the document that I send them. The document loads but is then hidden by a blue full screen cover with ‘Kami’ at the top. The document cannot be accessed at all by the student.

Is it now necessary to get all collaborators to login using a personal email or is this a glitch? Before, students were able to instantly access documents just using the link but now there is logging in, then marketing questions then finally they can see the document. Could it be simpler?! Thanks!