How to resolve an error: The sandbox is not in sync with the Podfile.lock

When I add new plugin in Flutter, I get this error in my runner xcode:

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

and I have already install CocoaPods and updated. I tried to run pod install and not fixed it help please

Solution 1:

In my case the issue was caused by a local android only plugin. I created a dummy podsec file for the plugin, then ran:

cd ios
flutter pub get
pod install
pod update

It seems like I need to do these steps after every xcode project clean now.

$ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.17.4, on Mac OS X 10.15.6 19G73, locale en-AU)
 
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 11.6)
[✓] Android Studio (version 4.0)

Solution 2:

In my case, i have cleaned the build and then updated the pod files , yet there were some warnings but those can be neglected:

> flutter clean
> flutter pub get
> cd ios
> pod update

Solution 3:

If anyone on an M1 Mac runs into this and gets an error running pod update, for me the fix was not running that command from VS Code but in the default terminal after setting it to Open using Rosetta.

After that it updated properly and I could build my app.