So Delphi 12.0? Is there any reason why you have not upgraded to 12.1? Not sure if that might actually make a difference here, however PAServer may have been changed to ensure that the file specified in the -exportOptionsPlist switch of the call to xcodebuild uses the correct value for the <method> key, which would be app-store-connect, rather than app-store:
That message looks more like a warning, than an error. I suspect the real problem is that there is some certificate issue:
I'm just not sure what that issue is.