The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.





Hello, this is Dr. Ho of Haiti. 
Today, we will learn what to do when an error occurs like the above command when building flutter iOS.

The method is simple.
The problem is solved by entering the command in the terminal or IDE terminal, executing it, and then building again. 

This command is to cleanly reset the project and organize pods.