ProtocolSupportStuff causing "Unknown Command..." ERROR/WARN on server start

[axemwa]

Plugin Version
ProtocolSupportLegacyChest 1.7

Server Version
1.13.2 Paper

The error

[12:56:50 INFO]: Unknown Command, please type /help

Image(s)

Original (closed) report as seen below
https://github.com/Speentie8081/ProtocolSupportLegacyChest/issues/1

Pretty sure I have no .jars missing

psstuff is reporting unknown command on their server running ProtocolSupportStuff, this is not normal.