I do not recommend installing Extended Extras + before completing the main storyline, because the mod's "Known bugs.txt" explicitly states "If you save the game, your progress goes down to 0% completed, I have no idea why.".
Your current save files are most likely relying on cribs added by the mod, which do not exist in your current installation so the game gets confused and crashes.
Although reinstalling Extended Extras + could make the game to successfully load your current save, I'd recommend you to start a new game without Extended Extras + mods installed.