Same problem here. It was working fine on Kodi until 3 or 4 hours ago when the user and pwd message started to appear. I have a valid user that works when I login to website.
Now on Kodi it's not working anymore.
Any clue?
Thanks!

Same here. Working perfectly until 3 or 4 hours ago. Correct user and pwd used at the website. Not possible to use in Kodi... any help would be highly appreciated. Thanks!