The crash you are getting in LUA is one I have seen some of since the recent game patch.
One user reported reducing the game's graphics settings to Low worked around the problem, or disabling Vsync, so you might try that for the time being.
There will be a hotfix for the game soon, most likely this week some time. While I don't know for sure what will be in it, please check for this problem again when you see it apply, and let me know how it goes them.
Sorry for this problem!