Waiting for another flutter command to release the startup lock

Question

When I run my flutter application it show

Waiting for another flutter command to release the startup lock

this messages and not

Answer 1

1. Delete pubspec.lock file
2. Run "flutter pub get" from terminal or editor shortcut ("get packages" AndroidStudio or this logo Visual Studio) in pubspec.yaml file.
3. Wait for download.
4. If it doesn't work relaunch your editor then repeat step 2..