Required dependencies

As for now xAuth needs the h2 library when running in non-mysql mode.

As it is not allowed to automatically download this file directly from an external site you have to do it manually.

  1. Open the following link in your favorite browser
  2. Click the link "jar" which should download a file named h2-1.3.164.jar
  3. Place this file into your lib directory located in your minecraft servers root.
  4. Start / reload the server to enable xAuth

If you have followed this instructions the plugin will load without any SEVERE message.