Follow this template except for feature requests. Use pastebin when providing /protocol dump and any relevant errors.

Make sure you've done the following:

• [Yes] You're using the latest build for your server version
• [Yes] This isn't fixed in a recent development build
• [Maybe] This isn't an issue caused by another plugin
• [Yes] You've checked for duplicate issues
• [Yes] You didn't use /reload

Full server log:
latest.log

Error Log: https://pastebin.com/mPFAChaX
Protocollib Dump: https://pastebin.com/VBAXTeEz

Description and relevant errors: This error appeared last time due to an incompatibility with advancedtaboverlay which was removed from the server after. The protocollib error appeared again, so I am not sure if any other plugin or protocollib caused this crash.