title: Why xcode can't see these files, however they physically exist
body: <p>Xcode run into compilation error while running the code.</p>
  
  <p>Unfortunatetly I was not able to find a solution online.</p>
  
  <p>These steps that I have commenced:</p>
  
  <p>=> git merge branch-name
  => can't find the files
  => git checkout branch-name file-name
  => files were physically found
  => xcode can't see it</p>
  
  <p>??? <img src="https://i.stack.imgur.com/AwO47.png" alt="enter image description here"></p>