Can't get Cotter to keep me signed in

I’m using Cotter to sign in on my website.

I have an ‘upload video’ button that is supposed to sign the user in, and then redirect them to the vide submission page, safeguarded by the Cotter Shield.

HOWEVER, it doesn’t seem to work. Even with conditions set up to allow only logged-in users, the website still seems to ask for a login EVERY TIME you click the ‘upload video’ button.

Does anyone know of any best practices, solutions, fixes?

I’d love any help :)))))