I have the exact same problem. I have played this game countless times before and never encountered it happening before, but now with my latest game, it's happening. I can't even click on the temple, from the ground view or even from the map view, without the game crashing instantaneously, right in the middle of the quest. I've tried going back to earlier saves, deleting my caches, quitting the quest and restarting it, removing all of my mods - nothing is fixing it. I can do any other quests in Egypt just fine, but any time I even try to click on the temple, it crashes. It has nothing to do with my memory or running other processes on my computer. I'm very frustrated, because it's the last quest I need to complete in Egypt, and I've never seen this happen before ever in any of my other games. I wish someone would offer some explanation or fix, instead of just chalking it up to slow performance of my computer, when it's very obviously some kind of bug.