I've run the flutter app from XCode Using XCode version 13.2.1 (latest in January 2022) XCode showing error like mentioned in image :
It is claimed by the Flutter team to be a bug with the visual component of XCode... as evidenced by the fact that the project will still build and run from XCode.
There are many reported ways to get rid of it temporarily, such as doing Product\build , Product\Clean Build Folder, or running the project on IOS from within Android Studio...
But these are only temporary and the problem will reappear.
https://github.com/flutter/flutter/issues/92337
How to get rid of this critical issue in XCode, thanks in advance.