Error screenshot
https://github.com/yuyaryshev/temp_files3/blob/master/factorio_O8Bl8VJbWb.png

What were you doing at the time of the error?
What was changed about the combinator?
Do you have any modded combinators in there, or any other mods installed?

Also, by the error, index out of bounds suggests you altered the raw data by script and expected it to work, i otherwise don't see any other ways such an error could have arisen, excepting for maybe migrations where the number of parameters for a constant combinator changed but I don't think that has happened.
That means whatever you were doing is very important to debugging this.

I just started a new game in God mode (sandbox) with vanilla combinators. Just to test this mod.
No scripting at all

were you using /editor?
the mod is not tested in the editor, nor do i intend to reasonably cover that game state beyond things that instantly crash the game or break things when the game returns to regular play state.