The mod Decider combinator output constant editor (1.1.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event decider-combinator-output-constant-editor::on_gui_closed (ID 96)
decider-combinator-output-constant-editor/control.lua:72: attempt to index field '?' (a nil value)
stack traceback:
decider-combinator-output-constant-editor/control.lua:72: in function 'disable_textfield'
decider-combinator-output-constant-editor/control.lua:119: in function <decider-combinator-output-constant-editor/control.lua:116>

do you have reproduction steps?

I closed a decider combinator GUI that was outputting 1. Didn't even use the mod on that combinator at all.

did you by any chance have the combinator gui open when you saved/opened the world?

It might've autosaved? I honestly don't tend to notice the game autosaving

fixed in 1.1.1