Just a hunch: when the Spiderling from Spidertron Patrols is running low on ammo

The mod Ammo Alerts (2.0.8) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Gun_Turret_Alerts::on_nth_tick(600)
Index out of inventory bounds.
stack traceback:
[C]: in function 'index'
__Gun_Turret_Alerts/control.lua:57: in function '?'
Gun_Turret_Alerts/control.lua:223: in function <Gun_Turret_Alerts/control.lua:171>

Tested this in 2.0.40, works fine for me... Do you have any other spidertron-modifying mods in there?

No other Spidertron changing mods.

Might Equipment Gantry interfere?

The Spiderling and Spidertron entity popups list the following mods:
- Spidertron Patrols
- Spidertron Enhancements
- Fire Lights
- Maraxsis
- Cerys (only Spiderling)
- Muluna (only Spidertron)