How to package for windows store? (pakaging settings)(badexecutable error in appx file)

hi
ive made a game
me and windows store publishers are stuck in the certification section
we are getting the bad executable error while signing the app
i was wondering do i have to change any of the settings in the packaging area in project settings?

(btw i have converted to an appx file and added the additional installers in the package but signing throws bad exe error)