What do you mean? it only happens to my friends (clients) but even with that mod installed they still crash not on joining but when they open inventory. Very odd. Happens 100% of the time

Sure, can I upload files here? I got my friend to since I was host (and i wasn't crashing) but he was and any other client. I'm just not sure how to upload files here, I feel maybe dropbox, I could use that?

@jaytuut you can just paste in that part as a text here
even mark it using > to be fancy

text

@adamrepl

Application has crashed: C++ exception
[string "lib/modifiers/modifierlessconcealment.lua"]:21: attempt to index field 'groupai' (a nil value)

SCRIPT STACK

modify_value() lib/managers/modifiersmanager.lua:79
_get_concealment_from_local_player() lib/managers/blackmarketmanager.lua:3087
get_suspicion_offset_of_local() lib/managers/blackmarketmanager.lua:3174
lib/managers/menu/playerinventorygui.lua:2977
init() lib/managers/menu/playerinventorygui.lua:990
new() core/lib/utils/coreclass.lua:35
_create_inventory_gui() lib/managers/menu/menucomponentmanager.lua:4127
create() lib/managers/menu/menucomponentmanager.lua:4116
original() lib/managers/menu/menucomponentmanager.lua:520
set_active_components() @mods/base/req/core/Hooks.lua:266
core/lib/managers/menu/coremenulogic.lua:89
_execute_action_queue() core/lib/managers/menu/coremenulogic.lua:54
update() core/lib/managers/menu/coremenulogic.lua:64
update() core/lib/managers/menu/coremenumanager.lua:155
update() lib/managers/menumanagerpd2.lua:20
update() lib/setups/setup.lua:909
original() lib/setups/menusetup.lua:363
update() @mods/base/req/core/Hooks.lua:266
core/lib/setups/coresetup.lua:559

Callstack:

     payday2_win32_release  (???)     ???                                                 
     payday2_win32_release  (???)     ???                                                 
     payday2_win32_release  (???)     ???                                                 
     payday2_win32_release  (???)     ???                                                 
     payday2_win32_release  (???)     ???                                                 
                  KERNEL32  (???)     BaseThreadInitThunk                                 
                     ntdll  (???)     RtlGetAppContainerNamedObjectPath                   
                     ntdll  (???)     RtlGetAppContainerNamedObjectPath                   

Current thread: Main

System information:
Application version : 1.143.246
CPU : Intel(R) Core(TM) i7-6950X CPU @ 3.00GHz (6 cores); SSE; SSE2; SSE3; SSSE3; SSE4.1; SSE4.2
DirectX : 12.0
GPU : NVIDIA GeForce RTX 2080 SUPER / nvldumd.dll[32.0.15.7628]
Language : english
Memory : 32689MB 480KB
OS : 6.2.9200 () 0x100-0x1 (64 bits)
Physics : threaded
Renderer : DX9 threaded
Sound : Realtek Semiconductor Corp. (Realtek Digital Output (Realtek High Definition Audio))