Mirkwood glitch offline 2 controler way

[Lijon88]

I know that most of you dont know about this glitch until it happends then you probably start googling like me. What i did to fix it fast and withouth waiting for some1 to help me. I started game on other account on standard difficulty and i invited my character 40 lvl just to rush thru the game until i clear spider from Radagast house then i pass the checkpoint so i had a save complited with missing objective to kill a hord of spiders. Thanks to that i could progress back on my main account.