Today I started getting this error:
Error 0x800B0100: The app bundle must be digitally signed for signature validation
After Project->Publish->Create App Packages I start the WACK and soon get the error.
Why am I suddenly getting this error and how can I fix it?
Thanks.
I am curious why WACK and Windows App Certification Kit are not allowed Tags.

m using Xamarin Forms. In My World, the Project drop down looks like this: