Apple TV App not opening in Samsung TV Series 8

Good afternoon Elnano3,

I understand you are trying to use the Apple TV app on a Samsung TV.

Check the resources below to review the requirements and compatibility for Apple TV and instructions from Samsung for your specific television model.

Set up the Apple TV app on your smart TV or streaming device

All about the Apple TV app on your Samsung smart TV - Samsung support

You can download the Firmware and Manual for this model from the Samsung support website.

Take care.