error , probably in firebase

[kia1349]

hi, good job

when i run project i get this error in android studio :

FAILURE: Build failed with an exception.

• What went wrong:
  Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'.

Could not resolve all dependencies for configuration ':app:debugCompileClasspath'.
Could not create task ':app:generateDebugLintModel'.
> Cannot invoke "Object.toString()" because "value" is null

in main.dart file , line22 , import 'firebase_options.dart'; has error
and in line 34 , options: DefaultFirebaseOptions.currentPlatform, has error