In game crash message:

The mod Rail Signal Planner (2.0.3) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event RailSignalPlanner::on_tick (ID 0)
RailSignalPlanner/scripts/objects/signal.lua:509: attempt to index field 'current_signal' (a nil value)
stack traceback:
RailSignalPlanner/scripts/objects/signal.lua:509: in function 'restore_signal'
RailSignalPlanner/scripts/logic/ghostify.lua:36: in function 'ghostify'
RailSignalPlanner/control.lua:90: in function 'build_signals'
RailSignalPlanner/control.lua:152: in function <RailSignalPlanner/control.lua:146>

Crash occurs when placing rails over ghost rails as part of a train depot. Depot consists of 4 wait positions and 1 train stop.
Mod Menu Settings:
-Place Signals while building: yes
-One-Way rails only: yes
-Build Rails even if directions conflict: yes
-Train length: 9
-Train Tiles: 62
-Rail Signal distance: 70

Space Age Version 2.0.69(build 84148 expansion, win64)
No other mods installed.