Deezer App won't work with Samsung Smart Hub

Hi there,

I have a Samsung Smart UHD LED TV UA75JU6400. I downloaded the Deezer app through Samsung Smart Hub and it comes up with "Deezer server is not responding. Please try again later. Press exit to exit the application"

I downloaded it yesterday and tried again today but no dice. Internet connection is working fine.
It doesn't even go to a login page. This is the first image that comes up when I click on the Deezer app.

Is there anything additional that I should be doing? Would appreciate some help.

Many thanks

John