Nookling exploit? It seems your save or the dream that you're injecting is corrupted...Okay, so did an experiment. Did Nookling exploit, saved. Nothing bad happened.
made a backup, put on ntr, put on instant tree code, planted a tree and ran the exploit, and saved. Tried to load my save after restarting system and got this:
Good thing I backed up lol.
reloaded a previous save with a save manager, and it loads perfectly after that.
It also crashes when I go into a house and walk out with the instant tree on, donno if that is related though.
Try injecting a different town and see if you still get errors.