title: The Jar of this class file belongs to container 'Android Dependencies' which does not allow modifications to source attachments on its entries
body: <p>I am making an email application which is giving the error in this question's title. How can I fix this problem? I am giving my codes screenshot if it is helps to find solution.</p>
  
  <p><img src="https://i.stack.imgur.com/eYeio.png" alt="enter image description here"></p>