Error while running event Transport_Drones::on_ai_command_completed (ID 119)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'index'
__Transport_Drones/script/depots/request_depot.lua:343: in function 'get_request_size'
Transport_Drones/script/transport_drone.lua:302: in function 'process_pickup'
Transport_Drones/script/transport_drone.lua:586: in function 'update'
Transport_Drones/script/transport_drone.lua:704: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>