[MODDED] Value cannot be null. Parameter name: source Issue dont know how to fix

you first have to check if every mod works with the version of spt that you have installed and if all the mods work with the tarkov version you have installed

i have a bit of experience in unity and C# but cant figure out exactly how tarkov handles its inventory's/UI

when the code executes realismod gives of the following error: Couldn't create item with template id: 56d59d3ad2720bdb418b4577 exception: System.ArgumentNullException: Value cannot be null.

maybe check if realismod doesnt like some settings from other mods (look at description and or comments of all the mods you have installed )

hope this helps

Quote from Lxtar

its fontains fov fix I didn't add it on the list cause I missed it when I was going thru them

so the problem was, you didn't upload everything that the "developer" of the Realism mod mentions in the description?