title: List<dynamic>', but got one of type 'Null' Server Handler: errorExpected a value of type 'List<dynamic>'?
body: <p><a href="https://i.stack.imgur.com/2AbcC.png" rel="nofollow noreferrer">enter image description here</a><a href="https://i.stack.imgur.com/7Zx9i.png" rel="nofollow noreferrer">enter image description here</a>Hi i have a question I've got this error
  <strong>Expected a value of type 'List', but got one of type 'Null'
  Server Handler: errorExpected a value of type 'List', but got one of type 'Null'</strong>
  can someone help?</p>
  <p><a href="https://i.stack.imgur.com/z9OiY.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p><a href="https://i.stack.imgur.com/Yv1Ee.png" rel="nofollow noreferrer">enter image description here</a></p>