title: UWP, Windows App: Cannot add Files manually
body: <p>When I try to run the Windows Store App Certification Tests for my Project I always get the errors you can see on the following images.</p>
  
  <p>These errors seem weird because they even occur in the <code>main.min.js</code> file which is empty and in the via Visual Studio included jQuery files.</p>
  
  <p>In addition it also complains that all files I added manually are not <code>UTF-8</code></p>
  
  <p>How do I fix that?</p>
  
  <p><a href="https://i.stack.imgur.com/AKZWD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/AKZWD.png" alt="Windows App Certification Test Failed"></a>
  <a href="https://i.stack.imgur.com/nOLdR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nOLdR.png" alt="enter image description here"></a></p>