DISCLAIMER: Potterworld or Droobledore LLC is not in any way affiliated with Mojang AB, J.K. Rowling, Warner Brothers or any company, copyright or trademark.
To join our server, you will need to make sure that you are using a premium (purchased) Minecraft: Java Edition account on any version between 1.10 and 1.13 with the IP play.pottworldmc.com. If you are fulfilling these requirements, you should be able to use a Virtual Reality mod on our server.
I hope this helps, and please let us know if you need more help!