When I change to an auth page I can't use any element there

[KarenTodd]

So, I'm working with this page that has to go to another page to click on a button, and this button takes you to an authentication page. So with this, are 3 pages. The issue is that the second page blocks me, cause is like it reloads, so I don't know how to manage this case.

I'm using roles to manage the different URLs, but doesn't work.

Can anybody help me?