title: An illegal reflective access operation has occurred
body: <p>I'm trying to use Kotlin in Visual Studio Code. I've just finished choosing the environment path, but when I try to run the program I get this warning every time:</p>
  <pre><code>WARNING: An illegal reflective access operation has occurred
  WARNING: Illegal reflective access by com.intellij.util.ReflectionUtil to method java.util.ResourceBundle.setParent(java.util.ResourceBundle)
  WARNING: Please consider reporting this to the maintainers of com.intellij.util.ReflectionUtil
  WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
  WARNING: All illegal access operations will be denied in a future release
  </code></pre>
  <p>If I try to run</p>
  <pre><code>--illegal-access=deny
  </code></pre>
  <p>I get the following errors:</p>
  <pre><code>error: unresolved reference: illegal
  --illegal-access=deny
    ^
  error: variable expected
  --illegal-access=deny
    ^
  error: unresolved reference: access
  --illegal-access=deny
            ^
  error: unresolved reference: deny
  --illegal-access=deny
  </code></pre>
  <p>I'm a bit of newbie, so how can I fix this problem?
  Thanks for every answer!</p>