Please report this error to the mod author.
Error while running event Transport_Drones::on_tick (ID 0)
Transport_Drones/script/depots/request_depot.lua:238: attempt to call method 'clear_drone_data' (a nil value)
stack traceback:
Transport_Drones/script/depots/request_depot.lua:238: in function 'suicide_all_drones'
Transport_Drones/script/depots/request_depot.lua:273: in function 'check_request_change'
Transport_Drones/script/depots/request_depot.lua:224: in function 'update'
Transport_Drones/script/depot_common.lua:393: in function 'update_depots'
Transport_Drones/script/depot_common.lua:401: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>
118.290 Error ServerMultiplayerManager.cpp:90: MultiplayerManager failed: "The mod Transport Drones (0.7.12) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event Transport_Drones::on_tick (ID 0)
Transport_Drones/script/depots/request_depot.lua:238: attempt to call method 'clear_drone_data' (a nil value)
stack traceback:
Transport_Drones/script/depots/request_depot.lua:238: in function 'suicide_all_drones'
Transport_Drones/script/depots/request_depot.lua:273: in function 'check_request_change'
Transport_Drones/script/depots/request_depot.lua:224: in function 'update'
Transport_Drones/script/depot_common.lua:393: in function 'update_depots'
Transport_Drones/script/depot_common.lua:401: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>"
118.290 Info ServerMultiplayerManager.cpp:769: updateTick(11496278) changing state from(InGame) to(Failed)
118.297 Quitting: multiplayer error.

I run in to the similar error on Singleplayer Krastorio 2

Die Mod Transport Drones (0.7.12) hat einen Fehler verursacht, der nicht behoben werden kann.
Bitte informiere den Autor der Mod über diesen Fehler.

Error while running event Transport_Drones::on_tick (ID 0)
Given entity doesn't exist anymore.
stack traceback:
Transport_Drones/script/transport_drone.lua:665: in function 'go_to_depot'
Transport_Drones/script/transport_drone.lua:164: in function 'pickup_from_supply'
Transport_Drones/script/depots/request_depot.lua:440: in function 'dispatch_drone'
Transport_Drones/script/depots/request_depot.lua:207: in function 'make_request'
Transport_Drones/script/depots/request_depot.lua:228: in function 'update'
Transport_Drones/script/depot_common.lua:393: in function 'update_depots'
Transport_Drones/script/depot_common.lua:401: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>
stack traceback:
[C]: in function 'set_command'
Transport_Drones/script/transport_drone.lua:665: in function 'go_to_depot'
Transport_Drones/script/transport_drone.lua:164: in function 'pickup_from_supply'
Transport_Drones/script/depots/request_depot.lua:440: in function 'dispatch_drone'
Transport_Drones/script/depots/request_depot.lua:207: in function 'make_request'
Transport_Drones/script/depots/request_depot.lua:228: in function 'update'
Transport_Drones/script/depot_common.lua:393: in function 'update_depots'
Transport_Drones/script/depot_common.lua:401: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>