Confirm it is active by typing /plugins in-game; it should appear green in the list.
If you're having trouble with version 2.80, I can help you or troubleshoot any startup errors you're seeing in your server console. The BEST Custom GUI Plugin For Minecraft (GUIPlus Tutorial) GUIPlus-2.80.jar
Place the GUIPlus-2.80.jar file into your server's /plugins folder. Restart the server to generate the configuration files. Confirm it is active by typing /plugins in-game;
The file is an older version of GUIPlus , a professional Minecraft plugin used to create custom interactive menus and graphical user interfaces for servers running on Paper or Spigot . Plugin Overview GUIPlus-2.80.jar