Hi Markus,
I believe something on your side may be blocking your access to the offer (e.g. malware, antivirus, javascript blocker, ad blocker).
I just clicked your affiliate link and here’s what I see:
https://drive.google.com/file/d/1gkPKSSoyzFJ3AmmGszOPVauja99z7aiV/view?usp=sharing
I used StrongVPN with their Las Vegas server.
It’s also important to notice that some of the offers you reported having issues to access in our private communication were for Germany, so you being in the US was probably the reason why those offers wouldn’t load for you without the help of a proxy or VPN.
William