title: mxgraph cell.getParent is not a function
body: <p>I am trying to implement the mxgraph. For non html value in the node or edge it's working fine but whereas for html value it's throwing the error cell.getParent is not a function.</p>
  
  <p>Even I set the html options as
  graph.setHtmlLabels(true);
  graph.htmlLabels = true;</p>
  
  <p>Below is the image with html value for node</p>
  
  <p><a href="https://i.stack.imgur.com/hiXuO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hiXuO.png" alt="enter image description here"></a></p>
  
  <p>Below is the image without html value node</p>
  
  <p><a href="https://i.stack.imgur.com/JcikE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JcikE.png" alt="enter image description here"></a></p>
  
  <p>Error at the browser console</p>
  
  <p><a href="https://i.stack.imgur.com/KdNmW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KdNmW.png" alt="enter image description here"></a></p>