Error:- Execution failed for task ':app:compileFlutterBuildDebug'.

[Sanket Kumar]

Hey.! I was trying to run my flutter code and this error shows up,  I found some solutions on the net but it isn't working for me, things which i've tried:
1) Deleting pubspec.lock, and running Pub.get in pubspec.yaml
2) Running 'Flutter clean' and doing pub.get

My flutter doctor:

Please help.