error when booting opencore mountain lion assert [opencore] imageloader.c(986): ((Boolean)(0==1))

i was trying to boot mountain lion and this error message pops up after waiting about 30-60 seconds, ive seen other threads about this only happening on mountain lion, but ive found no results

im using debug version of opencore and followed the dortania guide

specs:

intel core i5 4750

8gb ram

intel 4600 graphics

https://preview.redd.it/yltospjs3gcd1.jpg?width=4000&format=pjpg&auto=webp&s=50c293f5ce84a0a74ac4b076f5cebda29583a48c