Getting Invalid iMessage App from iTunes Connect

[y3102sof]

Hello,

I received an e-mail from iTunes Connect and it won't let me upload my app. It's because below reason.

"Invalid iMessage App - Your iMessage app contains an invalid sticker pack. The app may have been built or signed with non-compliant or prerelease tools. For more information, go to developer.apple.com."

I researched about it, but I cannot find clear solution. Do you have any suggestion? Please help.

[skjalgsm]

What does it look like when you open Xcode and what version of Xcode are you using?

[y3102sof]

I'm using 9.1 version of Xcode. I attached screenshots for Xcode. If you need more information, let me know.

[skjalgsm]

This all looks good.

I haven't tried to publish in a while, myself, but could you do me a favor and click the small arrow button in the bottom right of your second screenshot? (Its the one so that you can view the app icons).

Is there anything missing there? Like maybe the newly required 1024pt App Store icon? If so, can you add a 1024 icon to that slot and try again?

[y3102sof]

Sorry for late reply. I added 1024pt app store icon, then tried to upload but same result. Still working on how to fix it. Any idea?

[y3102sof]

I fixed it. I don't know why but if I build and upload by archive, everything goes well. Thanks for your support anyway.