title: TypeScript error in undefined(undefined,undefined)
body: <p>I am stuck with TypeScript error:</p>
  
  <pre><code>Failed to compile.
  
  undefined
  TypeScript error in undefined(undefined,undefined):
  File name '/path/to/file/MyFileName.types.tsx' differs from already included file name '/path/to/file/myFileName.types.tsx' only in casing.  TS1149
  </code></pre>
  
  <p>Spot the difference in first letter between <code>myFileName</code> and <code>MyFileName</code>. I have not idea how this happened and I don't know how to fix it. I have never seen this error before.
  I am using TypeScript Version 3.5.3. If someone can at least point me into direction what to do, it would be super helpful.</p>