Crashing when attempting to join MP

Assertion failed: mInventoryStacks.Num() > 0 [File:C:\BuildAgent\work\b731a33f2a691e17\UE4\FactoryGame\Source\FactoryGame\Private\FGInventoryComponent.cpp] [Line: 1173] Inventory need

IS this a mod crashing me ?

Solution

We found that if you remove the mod when a new person joins and gets items in their inventory then it can be restarted and the mod added back in.