Package Validation Error with MS Store upload

Question

I'm gettting a Validation Error when I try to upload my "msixupload" to the store to create a newer version of the app. It is in the store and available now.

I'm getting :

Invalid package family name: xxxxxxx (expected: yyyyyy)

and

Invalid package publisher name: zzzzzzz (expected: yyyyy)

Both properties (yyyyy) are greyed out in my Package appxManifest.

I've tried to Associate the app with the Store app and create new certificates, but it is not working.

Answer 1

i kept selecting Store certificates and eventually one I picked worked.