SDK error when uploading ipa to appstore

Hi all.

I’ve tried so many methods to upload an ipa to the appstore using Transporter but I always get the same error: ERROR ITMS-90725: “SDK Version Issue. This app was built with the iOS 13.2 SDK. All iOS apps submitted to the App Store must be built with the iOS 14 SDK or later, included in Xcode 12 or later.”

I created the provision and the certificate with no errors, all made from a Mac in a cloud service. I have xCode 12.5.1 installed. I’ve packaged my unreal project using originally unreal version 4.23, then tried 4.26 and the latest 4.27 preview 2 both with the minimum iOS version pointing to 14.0 but everytime I get the same SDK version error when uploading to the appstore using Transporter.

Is there something I’m missing or doing wrong? Anyone knows what workaround should I try or could point me in the right direction for uploading to the appstore?

Hope someone can help.

Thank you.

SDK error

os version