Flex/amazon prime video doesn't work

Every time I open amazon prime video on flex I can see the Home screen but when I want to watch something I get an error message saying "Something went wrong". I tried unregistering Flex from my Prime video account, I did a system refresh on Flex and after that registered Flex again with Prime video. The first show I watch, it works fine. The second show I want to watch, the error message appears. Prime video works just fine on all my other devices. This is a horrible Flex user experience, is there a solution that doesn't require me to unregister - system refresh - register every single time I want to watch one single show???