Can’t access add on.

This is solved! For anyone experiencing a similar issue, restarting the PC worked for me :) 

 I payed with Klarna and got a confirmation email, the first instalment has left my account, however I can’t download the add on and it is still in my basket. I was wondering if I have to wait for all three instalments to come out before I can play it? If not is there something I have to do? I’ve never used Klarna before so I’m a little confused.