The situtation:
I have 5 rocket silos stored in the network and clicked on them, to retrieve the rocket silos into my inventory. The moment I clicked on the rocket silo slot in the network terminal the game crashes with the following message:

The mod Items Network [BETA] (1.12.5) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event items-network::on_gui_click (ID 1)
count must be positive
stack traceback:
[C]: in function 'insert'
items-network/scripts/lib/virtual_inventory.lua:395: in function 'MoveToInventory'
items-network/scripts/terminal_gui.lua:400: in function 'handler'
items-network/scripts/lib/events.lua:71: in function '?'
items-network/scripts/lib/events.lua:33: in function 'on_event'
items-network/scripts/lib/events.lua:15: in function <items-network/scripts/lib/events.lua:15>

EDIT:
Removing Cargo Landing Pads from the network through the network terminal also crashes the game. I only had a single one stored this time.