Stickers for iMessage like a part an app

Only one thing, i can’t set an icon. All time recieve an error:

I/O error reading PNG header! iMessage App Icon27x20@2x.png /RedHood/content/external_res/ios/PlugIns/StickerPackExtension.appex line 0 Problem

and it do not depend on icon source. Any icons after packing into xcassets have this error when build app in defold

without icons - all fine