How to solve "Could not prepare isolate" error?

Question

Installing build\app\outputs\flutter-apk\app.apk...                19.2s
E/flutter (23961): [ERROR:flutter/runtime/dart_isolate.cc(143)] Could not prepare isolate.
E/flutter (23961): [ERROR:flutter/runtime/runtime_controller.cc(385)] Could not create root isolate.
E/flutter (23961): [ERROR:flutter/shell/common/shell.cc(604)] Could not launch engine with configuration.

I do it flutter doctor but there no problem and I do it flutter clean and flutter run also but nothing run

Answer 1

1- Clean project
2- Select main.dart file, Then Run project.....

Simple :)