AltStore could not be installed onto AppleTV 4k

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.}

The report names no source file, test, or entry point. Start by reproducing the AppleTV installation failure and trace the AltWidgetExtension.appex error, then verify that AltStore installs successfully onto AppleTV without the unknown extension-point error.