565 │ 781.751 Error MainLoop.cpp:1429: Exception at tick 4492584: The mod Recharging Armor (2.0.0) caused a non-recoverable error.
566 │ Please report this error to the mod author.
567 │
568 │ Error while running event Recharging_Armor::on_gui_opened (ID 95)
569 │ Recharging_Armor/control.lua:119: attempt to index field 'grid' (a nil value)
570 │ stack traceback:
571 │ Recharging_Armor/control.lua:119: in function 'updatepower'
572 │ Recharging_Armor/control.lua:94: in function <Recharging_Armor/control.lua:87>
What caused this (idk if that's relevant)
inside blueprint sandbox (from a mod) I used an upgrade planner to downgrade red belts and undergrounds to yellows, undid those actions, and pressed redo.