Got following message from Plex “failed to run the package service” when installing and trying to run it. I had missed adding certificate key. There’s a good tutorial here at plex The public key that needs to be added in the package center: https://downloads.plex.tv/plex-keys/PlexSign.key
While running Windows Phone 8.1 on simulator got this error when changing configuration: unexpected error exception from hresult 0x81030137 Fixed it by removing the app on the simulator and ran it again from visual studio. To remove hold down the lauch icon on the mobile, then you’ll get a menu to uninstall it.