title: Terraform: Failed to unlock state: failed to retrieve lock info: unexpected end of JSON input
body: <ul>
  <li>Terraform v0.13.5</li>
  <li>provider aws v3.7.0</li>
  <li>Backend: AWS S3+DynamoDB</li>
  </ul>
  <p><code>terraform plan</code> was aborted, and now it cannot acquire the state lock. I'm trying to release it manually but get error:</p>
  <pre><code>terraform force-unlock -force xxx-xxx-xx-dddd
  
  Failed to unlock state: failed to retrieve lock info:
  unexpected end of JSON input
  </code></pre>
  <p>The state file looks complete and passes json syntax validation successfully.</p>
  <p>How to fix that?</p>