12941.073 Error MainLoop.cpp:1429: Exception at tick 847857: The mod Kuxynator's Slim-Inserters (3.0.13) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Kux-SlimInserters::on_robot_mined_entity (ID 67)
Unknown entity name: basic-slim-inserter_arrow_arrow
stack traceback:
[C]: in function 'find_entities_filtered'
Kux-SlimInserters/events/on_destroyed_entity.lua:6: in function 'destroy_matching_arrow'
Kux-SlimInserters/events/on_destroyed_entity.lua:66: in function <Kux-SlimInserters/events/on_destroyed_entity.lua:43>
12941.075 Error ServerMultiplayerManager.cpp:84: MultiplayerManager failed: "The mod Kuxynator's Slim-Inserters (3.0.13) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Kux-SlimInserters::on_robot_mined_entity (ID 67)
Unknown entity name: basic-slim-inserter_arrow_arrow
stack traceback:
[C]: in function 'find_entities_filtered'
Kux-SlimInserters/events/on_destroyed_entity.lua:6: in function 'destroy_matching_arrow'
Kux-SlimInserters/events/on_destroyed_entity.lua:66: in function <Kux-SlimInserters/events/on_destroyed_entity.lua:43>"
12941.075 Info ServerMultiplayerManager.cpp:805: updateTick(847857) changing state from(InGame) to(Failed)
12941.085 Quitting: multiplayer error.

I think this is an old issue caused by an orphaned basic-slim-inserter_arrow, which should not exist. the problem of the orphaned basic-slim-inserter_arrow has already been fixed in one of the last versions, and you may have found an old one.

orphaned basic-slim-inserter_arrow can be recognised by the fact that they cannot be operated or deleted.
as there are no more of them now, i can't test this more precisely.

Should the problem occur again, please report it again.