Android Spotify login successful but ignored by DJay app


I have just installed DJay for android (Samsung S5). When I connect to spotify, it correctly redirects me to the Spotify login page in my browser. I log in successfully but DJ app never recognises that I am logged in.

If I repeat the process, select the spotify button, it again directs me to my browser and my browser says “DJay will be able to receieve… you are logged into spotify as user xxxxx” but DJ fails to recognise that I am logged in.