Hello! I am trying to join in but every time I press multiplayer and then join pokefind it won't let me in and always says "Failed to connect to server. Not authenticated with Minecraft.net". I am not sure if this is on minecrafts side or yours but it could be since I got a new computer and using it. Thank you and sorry if this wastes time.
If you are using Minecraft Java, you should be able to get onto the server just fine(recommend 1.10-1.13) But if you are using Windows 10 minecraft, we do not support that version(which is why it is giving you the not authenticated with minecraft.net) and therefore you will have to go out and buy minecraft