It's strange that you are getting this error. I'm not sure if you know it, but the listed mod "quality" is the mod written by Wube which adds all the Quality stuff to the game in the Space Age DLC (Rare, Legendary, etc.). The Quality of Life Research mod simply modifies the character. Since characters do not have quality, i.e., a character cannot be Elite, Legendary, etc. and since the Quality mod only affects items (a character is not an item) then it's weird that QoL would have anything to do with Quality.
Are you sure that you did not do anything to any other mod, or install any other mod at the same time?
I myself am at the endgame of my present scenario...I have Quality (but not Space Age itself) enabled. I installed this mod during endgame and I have researched all the Tech up to the infinites and I have had no problems.
You might want to give more info, like:
1) when do you crash? When the game loads? During loading of a save game? Did you begin your game with this mod or did you install it later on (like I did)?
2) did you change any of this mod's setting from their default values?
3) what other mods do you have installed?
