Hello Loulou9,
Thanks for reaching out to us for support. It’s never fun when you can’t watch your favorite shows on Apple TV+, and we are going to do everything we can to help you. When you have a free moment, can you please tell us when you first encountered this issue and if you have made any changes to the settings on your Apple TV? Also, can you please tell us all the troubleshooting steps you have taken so far in an attempt to resolve your issue so that we can avoid repeating them? When possible, please be specific when describing the steps you’ve taken and the outcome after each step. Lastly, please tell us the version of tvOS you are currently running, and check out the links below for resources that can potentially help to resolve your issue.
If you can't watch or stream films and TV programmes in the Apple TV app
Download and stream shows and movies from Apple TV+ and Apple TV channels
Update Apple TV software
Thanks for using the Apple Support Communities.
Cheers!