title: Task 'assemble' not found in root project
body: <p>I am trying to import a project in android studio 3.1 but when I try to build the project it says "Task 'assemble' not found in root project". I searched for this error but didn't find straight forward answer and exist answers like  <a href="https://stackoverflow.com/questions/21364895/android-studio-0-4-3-task-assemble-not-found-in-root-project">This</a> didn't work for me. any solution please? </p>
  
  <p>[SOLVED]:
  <strong>The problem was because of missed settings.gradle file! just added it manually to the main project folder</strong></p>