AltStore could not be installed onto AppleTV 4k

[cellulosa]

I can see the AppleTV in the list of available devices on AltStore, so I tried to click on it to install it but I get:

AltServer.ServerError 2008

Failure Reason
Appex bundle at /var/installd/Library/Caches/com.apple.mobile.installd.staging/temp.4CIlf2/extracted/AltStore.app/PlugIns/AltWidgetExtension.appex with id com.38UJ2738X6.com.rileytestut.AltStore.AltWidget specifies a value (com.apple.widgetkit-extension) for the NSExtensionPointIdentifier key in the NSExtension dictionary in its Info.plist that does not correspond to a known extension point.

Title
AltStore could not be installed onto AppleTV.

Underlying Error
Error Domain=Apple.InstallationError Code=0 "Appex bundle at /var/installd/Library/Caches/com.apple.mobile.installd.staging/temp.4CIlf2/extracted/AltStore.app/PlugIns/AltWidgetExtension.appex with id com.38UJ2738X6.com.rileytestut.AltStore.AltWidget specifies a value (com.apple.widgetkit-extension) for the NSExtensionPointIdentifier key in the NSExtension dictionary in its Info.plist that does not correspond to a known extension point." UserInfo={NSLocalizedDescription=Appex bundle at /var/installd/Library/Caches/com.apple.mobile.installd.staging/temp.4CIlf2/extracted/AltStore.app/PlugIns/AltWidgetExtension.appex with id com.38UJ2738X6.com.rileytestut.AltStore.AltWidget specifies a value (com.apple.widgetkit-extension) for the NSExtensionPointIdentifier key in the NSExtension dictionary in its Info.plist that does not correspond to a known extension point.}