If you are getting the “permission denied” error message while trying to run
./gradlew clean or
./gradlew build manually in your project:
-bash: ./gradlew: Permission denied</div>
You have to make the gradlew file executable. Open a terminal, navigate to the folder where your
gradlew file is, and set execute permissions:
chmod +x gradlew
It is also a good idea to close the project in Android Studio while working with the gradle wrapper from the terminal.