The mod Railway Tunnel (0.0.9) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event railway_tunnel::on_entity_died (ID 4)
railway_tunnel/scripts/portal.lua:1499: Train is crossing a tunnel portal's transition threshold while registered as actively using this tunnel, but not in the approaching state.
trainId: 120549
enteredPortalId: 393
reservedTunnelId: 24
stack traceback:
[C]: in function 'error'
railway_tunnel/scripts/portal.lua:1499: in function 'OnPortalTransitionTrainDetectorEntityDied'
railway_tunnel/scripts/tunnel-shared.lua:445: in function 'handlerFunction'
railway_tunnel/utility/events.lua:158: in function <railway_tunnel/utility/events.lua:151>

Were other mods active or anything unique about when this occured?

I have following Error:

Die Mod Railway Tunnel (0.0.9) hat einen Fehler verursacht, der nicht behoben werden kann.
Bitte informiere den Autor der Mod über diesen Fehler.

Error while running event railway_tunnel::on_entity_died (ID 4)
railway_tunnel/scripts/tunnel.lua:414: Custom train carriage unsupported: bob-locomotive-2
stack traceback:
[C]: in function 'error'
railway_tunnel/scripts/tunnel.lua:414: in function 'CanTrainFitInTunnel'
railway_tunnel/scripts/portal.lua:1265: in function 'OnPortalEntryTrainDetectorEntityDied'
railway_tunnel/scripts/tunnel-shared.lua:442: in function 'handlerFunction'
railway_tunnel/utility/events.lua:158: in function <railway_tunnel/utility/events.lua:151>

Lmv modded railway carriages aren't supported.