Open the BP_MasterItemInventory in Class Defaults untick Component Replicates

Next open the BP_GlobalInventoryManager and in the Class Defaults set Net Update Frequency to 20 then copy the video below.

Next go to the BP_CharacterComponent and create a new variable called DeadInventoryDetails set its type to S_ContainerDetails and set its Repliucation setting to RepNotify. Then open the OnRep_DeadInventoryDetails function and copy the images below.

Then go to the BP_SGKController open the AddEquipmentComponent and add the highlighted nodes in the image below.

Next Open the BP_PlayerInventory then go to the Networking collapsed node and copy the video below.