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

Make sure you've done the following:

• You're using the latest build for your server version
• This isn't an issue caused by another plugin
• You've checked for duplicate issues
• You didn't use /reload

Debug paste link:
This is the pastbin for the server startup log: https://pastebin.com/2Fyh5vQ3
Located the part that seemed to be the ProtocolLib Error...:https://pastebin.com/6bTYTNNe

Description and relevant errors:
This happened after a server restart after using the in game command to update the ProtocolLib plugin. /protocol update, was it?
It says invalid .jar...not sure why. The jar is in the plugins folder and seems to be there just fine.