I was recently starting the, "Breaching security" quest for the dark brotherhood and I fast traveled to a location in hopes for Gaius Mora to move so I could kill him in a different city. But this ended up in him getting stuck on a mountain near Solitude and i've been trying to get to him but it just won't work! Please help..? And if I go back to a previous save before I started the quest, I will lose two levels.. So I don't know what to do. ;_;

You need to post what platform you're using, and which version - vanilla or SSE. And if you're using any mods. AND this should be in the Cheats Hints Spoilers forum....