Moved to Community Support - Please use the correct category next time
I would suggest checking your logs, they may explain why this cause Warp GUI to stop working. You can access your logs by running the command /dl logs in game.
Moved to Skript Discussion - Please use the correct category next time
Reply with a paste of your Script and the errors your receive upon reloading it.
Moved to Community Support - Please use the correct category next time
Use the Essentials plugin if you want homes on your server, teleporting comes default with no plugins needed.
Moved to Community Support - Please use the correct category next time
Just to answer your question, there are villages and nether fortresses on server worlds. Locked - Question has been answered.
Moved to Community Support - Please use the correct category in the future.
Just to answer your question, you cannot delete your server. However, you can reset it to a blank state, follow this video for some useful information