I notice several issues related to screenshots and localized languages. I have an iPad (only) app, English only . Attempting to submit to Itunes I get 2 errors, one related to Localization (just English is localized) and 12.9 inch Display message - You must provide a screenshot fro the primary size of a device". I have take new Retina screenshots (iPad Air 2) and loaded them (via my Mac) to the screenshots "other sizes" area as this is the only place they were "accepted" (dropping them in).
Are the above errors related? If I fix the missing screenshot issue will the localization issue go away? How can I generate a screenshot that will be accepted in the 12.9" app preview screenshot area? Do I need to have a 12.9" iPad pro to do this (surely not)?
Sorry, I am lost with this, been struggling for a full day.