The URL is: http://feeds.feedburner.com/tweakers/nieuws
The screen is black and loading takes ages. We’re using Windows 7. How do I get it to work?
Could you try validating your feed here https://validator.w3.org/feed/
also which CMS and player version are you using please?
You can also go through Report Fault Wizard and check CMS logs it will tell you that it is invalid and why (same as the feed validator linked earlier)