Started using filter combinator on a second planet in SE and it shows "Disabled by Script" and doesn't output anything. Also at one point got the newindex error but didn't get the exact error message. Will followup if I get it again.

The mod Filter Combinator (1.1.7) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Filter_Combinator::on_nth_tick(3600)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'index'
__Filter_Combinator/script/update.lua:14: in function 'getOutputParameters'
Filter_Combinator/script/update.lua:136: in function <Filter_Combinator/script/update.lua:130>

This error seems to happen after removing the filter combinator that's having the "disabled by script" problem.

I think combinators get stuck in the "Disabled by script" state if the number of signals they are outputting goes above the "Filter Combinator Output Slots" mod setting

I've released a fork that should fix this: https://mods.factorio.com/mod/filter-combinator-updated