Trying to gives the backtrace below and fails, factorio 0.18.26., pickerinvtools 1.1.4 and bob's equipment mod. It fails for both bob-only laser defense and the base game laser defense (possibly modifed by bob's).

1583.224 Script @stdlib/stdlib/core.lua:46: LuaEquipment API call when LuaEquipment was invalid.
stack traceback:
[C]: in function 'take'
PickerInventoryTools/scripts/toggle-equipment.lua:55: in function <PickerInventoryTools/scripts/toggle-equipment.lua:51>
(...tail calls...)
[C]: in function 'pcall'
stdlib/stdlib/event/event.lua:354: in function 'dispatch_event'
stdlib/stdlib/event/event.lua:437: in function <stdlib/stdlib/event/event.lua:388>

Happens only when "toggle active defense" is disabled at the time, otherwise inserting works. And not surprisingy when toggling that button it gives a similar backtrace.

This should be fixed with the latest release.

Thanks again!