title: Unity3D error "Invalid Build path"
body: <p>When I try to build any type of game using Unity, it is giving me this error:</p>
  
  <blockquote>
    <p>Invalid build path: c:/users/dell/desktop/projects/unity projects/fox the game
    UnityEditor.BuildPlayerWindow:BuildPlayerAndRun()</p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/GXEQy.png" rel="noreferrer"><img src="https://i.stack.imgur.com/GXEQy.png" alt="What the error looks like"></a></p>
  
  <p>It does this with any path</p>
  
  <p>I can't seem to find any reason for this error. I am building on WebGL with 2D graphics.</p>
  
  <p>Version: Unity 2019.1.1f1 Personal</p>