The mod Reverse Factory (8.2.4) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event reverse-factory::on_tick (ID 0)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'index'
__reverse-factory/control.lua:12: in function 'checkinvs'
reverse-factory/control.lua:76: in function <reverse-factory/control.lua:72>

Hm, can you provide the save file that causes the error? Disabling the auto-ingredient push setting for this mod, and then saving and reloading before the save file crashes should allow you to keep playing in the meantime

EDIT: This error was likely fixed at some point between 8.2.5 and 8.2.9, as those fixes involved modifying the control.lua code that caused this crash. Confirmation by user below:

Thank you Kryzeth, that fixed it for my savegame.
Thumbs up.