Our old project build failed after Xcode11.4

The error is:
"Your target is built for iOS but contains embedded content built for the iOS platform (NotificationService.appex), which is not allowed."

It went well before Xcode11.4 (it means <= Xcode11.3) and
I've tried to create a new project contains two targets, one is main app and one is NotificationService Extension, it passed the build phase.
I've tried to remove the NotificationService.appex from project, then it went well.
What went wrong?

Why the old project was stuck?
Are there any solutions, please?
Answered by stonewin540 in 628374022
Step by step comparison... at the last in the info.plist file
The old project contains an item "CFBundleSupportedPlatforms->iPhoneOS", remove it, everything will go well...
What does that item mean?
Accepted Answer
Step by step comparison... at the last in the info.plist file
The old project contains an item "CFBundleSupportedPlatforms->iPhoneOS", remove it, everything will go well...
What does that item mean?
Our old project build failed after Xcode11.4
 
 
Q