Can't authenticate with Spotify

Whenever I try to authenticate with Spotify (I am using this link: it just opens a popup window that says:

This popup should automatically close in a few seconds.

However it never closes and eventually fails. Am I doing something wrong?

Hi, I think this is a problem at our end. We are investigating.

It should work now, please have another go when you get a chance. And thanks for reporting.

Everything works as expected now, thank you!