Hello Piranhi,
This could be related to a bug report that I put in yesterday: UE-45526. If so, please try enabling the Gear VR plugin if it is disabled. This is set to be fixed in 4.16.1 but this should be a suitable workaround in the meantime.
Edit: If enabling the plugin doesn’t help immediately, I would suggest deleting your Saved and Intermediates folders prior to attempting to package again (If you’re in a code project, you’ll also need to Generate Project Files after doing so to regenerate these folders, otherwise it’ll be done when packaging)