when i try todo /lootbags_dumphelditem , it says unknown error.
any way to solve this?

this is what the console says
https://pastebin.com/TmL9dmwj

It means that the command doesn't exist, which means your Lootbags version is before 2.3.5.

Hi, I'm part of the group with DeathSaintfool, we're running Version 2.3.7 on the server. If we have nothing in our hands while executing the command it says
Lootbags Held Item Dump Failed: Player has no held item.

But if we have something in our hands it gives the error:
An unknown error occurred while attempting to perform this command

And the paste above shows what appears in the console

It'll be fixed in 2.3.8.