Little help with a MOD Causing an error on a server

so seems like my mod is giving this error:

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Anyone know what might cause this?

The first line is a prime suspect.

You’ve done something to/with an inventory the server/client does not like.

-WM

ok but what and where if my mod isnt a full conversion mod it should effect the main core files should it?

This has nothing to do with the type of mod.

Your mod is trying to do something it’s - basically - not allowed to.

Look at your mod, look at where you’ve done things to inventory components. Those will be your primary targets for finding the error.

-WM

Not sure where the error is I looked in all my inventory files and have yet to find what’s causing the error

Could a item missing or requiring inventory file be causing this?

so i have checked everything even the refresh interval on all the items i added that have an inventory and they are all set to 5.0 i dunno what causing this and it not all servers have this issue its only a hand full of ppl having this issue wish maybe a dev or someone would help me out with this or give me some insight of what might be causing this thanks!