Flutter entrypoint lacks main function

Error: Entrypoint doesn’t contain a main function Flutter

I encountered the following error when attempting to run my Flutter project:

Error: Entrypoint doesn't contain a main function Flutter

I attempted to resolve the issue by restarting Android Studio, but this did not work.

The error message suggests that there is no main function in your Flutter project’s entry point.

To resolve this issue, make sure that your main.dart file contains a main function:

void main() {
  // your code here

If the main function already exists, double-check that the file path specified in your project’s run configuration is correct.