Im getting this error. Spams console a bit, but does disappear after the server has been started for a few minutes. https://pastebin.com/RUShCz9W
Paper Build 55,
Protocallib Build (4.4.0)
HolographicDisplays Build 72
Not sure if this is because of Protocallib or HolographicDisplays.

NVM just realized there is a protocallib build i didn't know about, Just updated to it and it fixed the error.
Closing Issue