not able to run app on iOS

[rubinbasha]

I did add flutter_flavorizr after creating the project, nonetheless, the project is quite new, max one month old. When trying to run it in an iOS simulator I get this error:

Launching lib/main-dev.dart on iPhone SE (2nd generation) in debug mode...

Running Xcode build...

Xcode build done. 3.7s
Failed to build iOS app
Error output from Xcode build:
↳
** BUILD FAILED **

Xcode's output:
↳
diff: /Podfile.lock: No such file or directory
diff: /Manifest.lock: No such file or directory
error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.
note: Using new build system
note: Building targets in parallel
note: Planning build
note: Constructing build description
warning: Capabilities for Signing & Capabilities may not function correctly because its entitlements use a placeholder team ID. To resolve this, select a development team in the Runner editor. (in
target 'Runner' from project 'Runner')

Could not build the application for the simulator.
Error launching application on iPhone SE (2nd generation).