Hello mouhamid,
Thanks for choosing the Apple Support Communities. we see you're having issues signing in using your Apple ID on the Apple TV website. We can help.
To start, let's try following these steps to watch in a web browser: Watch in a web browser - Apple Support
"On a Windows PC (including Microsoft Surface), Chrome OS device, or Android device, you can watch Apple TV+ and MLS Season Pass in the Chrome and Firefox web browsers.
How to watch in a web browser
- Go to tv.apple.com to subscribe to and watch Apple TV+ or MLS Season Pass in a web browser.
- If you already have an Apple ID, you can sign in to start your free trial. You may be asked to add or verify a credit card to ensure the account holder has authorized viewing on the web. For more information, see the Apple Support article Parental controls for Apple TV+ on the web.
- Note: If you experience difficulties with auto-play functionality while watching Apple TV+ or MLS Season Pass in a web browser, try turning off any ad blocker extensions or apps you’ve installed."
If those steps don't help, see if the same thing happens using FireFox.
We hope this helps.
Cheers!