Console error on server start up

Bug Report

SpigotMC Username

Please provide your SpigotMC username:

Username: Nuper

Version

Please provide the version by using the /fb about command:

Version: ![image](/uploads/e1aa12de9fb0c0722394fc1477406337/image.png)

Debug Output

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Debug Output: N/A

Error Stacktrace

If applicable, provide the error stacktrace:

Stacktrace: N/A

Expected Outcome

Describe what you expected to happen:

Expected Outcome: Not to show up on server restart

Description

Provide a detailed description of the issue:

Description: When I restart my server, this error pops up https://pastebin.com/0gEhxurz , and im not sure why. I also noticed the same error pops up when people join, but thats random and doesn't do it every time a player joins. I have the plugin configured to the way I like it and it works great, so im not sure whats up with that error. :smile: