Can't login to watchespn successfully

This is likely my cable providers’ issue, but I hope someone will have some thoughts on the matter.

I go to watchespncom, choose my game, and click on my cable provider(suddenlink). I then enter my credentials, that I know are correct. And then nothing. Page just goes blank. Doesn’t even spin.

I’ve tried with brave, firefox, midori, opera, and vivaldi.

I had difficulties with this process in win10 as well. In windows, I have to use a private browsing page so I can even get to the login page after the first use on a particular browser.

Does anyone have any ideas? TIA.