try some tips below and tell me if that works

Restart your computer and relaunch the project

This might seem basic, but a simple restart of your computer and a relaunch of your Flutter project can sometimes resolve temporary issues related to the development environment.Try also to upgrade flutter with : flutter upgrade.

Delete the android folder and rebuild the project (if the project isn't too advanced)

If the first step doesn't work and your project isn't overly complex (meaning you haven't made deep Android-specific modifications), you can try deleting the android folder at the root of your Flutter project.

After deleting it, open your terminal in your project's directory and run the following command:

flutter create .

It will recreate the android folder

Provide more details about the error

If none of the above solutions work, we'll need more information to diagnose the problem. Could you please:

Copy and paste the full error message you're getting in your terminal or IDE.

Indicate the Flutter version you're using (flutter --version).

Specify any recent changes you might have made to your project or environment.

This additional information will help us pinpoint the exact cause of the build failure.

Thanks !