I think i have found a solution to this problem, due to the fact i also had this error and solved it. So i've exported a export.zip, modified it, zipped it and i got also this error .. Solution, if you have an export folder and you zip it, you'll see an /export/ path in your zip file and that's why he doens't accept it, so you need to re-zip your zip file in the export folder .. Meaning your zip file shouldn't contain any parent folder.. you see? :) below an invalid re-zipped export.zip file to illustrate the problem cheers