title: Azure DevOps User cant add tasks to sprint
body: <p>I have a user who can get into a sprint, but cant add tasks to existing work items, and the green &quot;+&quot; symbol doesnt appear anywhere to add a new task.</p>
  <p>In the sprint security the user has all 4 permissions :</p>
  <pre><code>Create child nodes ( inherited )
  Delete this node
  Edit this node
  View Permissions
  </code></pre>
  <p>The user is also a member of a group which doesnt have &quot;Delete this node&quot; permissions in the sprint.</p>
  <p>Thanks.</p>