https://discord.gg/Pw8uZVU This Discord has the user kwright02#0001.
He says he could fix this error if there were mod open sources.
He says he knows how to fix this error.
I'm talking about a listener error.
In a network it is usually at 03.00-6.00 GMT time,well, even earlier than that in any case write to him if you decide to fix the error listener.

@plantonev you know the mod is open source. You can make a fork. Fix the issue and pullrequest it here.
Look: https://github.com/TinyModularThings/Player-Weight/tree/master/playerWeight/handler
The only thing that isn't in the repository is the "Forge Gradlew" instance, because its written in a way where it should run in any version. So if you are up to date or out of date it does not care.