title: Could not read serialized diagnostics file: Invalid File: Invalid diagnostics signature
body: <p><a href="https://i.stack.imgur.com/Kox0d.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Kox0d.png" alt="enter image description here" /></a></p>
  <p>I'm getting this weird warning. I'm not sure what could cause it.  A <a href="https://filext.com/file-extension/DIA" rel="noreferrer">.dia</a> file extension supposedly indicates a core digraph graphics file. I did not add one and the app has almost no ui at all.</p>