PlayerJoinEvent and ar check not working

[invreck]

hi this morning the plugin began tworing up errors in the console whenever a player would join or leave the server.

In addition, executing the command /ar check works fine but doing /ar check followed by the name of a player comes up with this error in game chat
https://prnt.sc/10ruugm

here is the complete log from the server from today
https://mcpaste.io/d1619e9af2d414d8