1. Make sure that you open xcworkspace instead of xcodeproj. xcworkspace - contains information about pods.

2. flutter clean

3. flutter pub get

4. cd ios; pod install

5. The error all the same will be display

6. Try to build. Build should be succeeded and the error disappear.

take a look at this blog as well - > https://medium.com/apparence/how-to-fix-no-such-module-flutter-error-in-xcode-d05931905def