Spotify login on Djay Pro (iPhone) gets stuck at Terms & Conditions

I downloaded Djay Pro on my iPhone (6S) today, but I can’t connect to Spotify because it gets stucks when I try to accept the ‘terms and conditions’ of Spotify. I’ve tried login using my regular Facebook login, or the old trick of creating a password specific for the app. Both get stuck at the same place.

Also, if I try to add “djay Pro for iPhone” on the Products & Services on the right of this page, it doesn’t exist…