title: java minecraft error unrecognized VM option UseConcMarkSweepGC
body: <p>So i was trying to make my own Free Server so i watched a tutorial how to do that with Hamachi
  so i tried then came this <a href="https://i.stack.imgur.com/LE5Ak.png" rel="nofollow noreferrer">Error</a></p>
  <p>i already tried to find where i can fix it or sth like that but i dont know yet.</p>
  <p>Here is the link to the Tutorial i tried with .
  <a href="https://www.youtube.com/watch?v=9RpA14YdEe0&amp;t=154s" rel="nofollow noreferrer">https://www.youtube.com/watch?v=9RpA14YdEe0&amp;t=154s</a>
  I´d be very happy if you can help me .</p>