I don't see "upper" on line 314. Is your settings.lua modified? Is it's icon green?
That said, it might be from some bad setting in your profile. Try starting with the default profile and see if it starts. If it does then you know there is something wrong with your profile.
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I check all posts before reading PMs. So if you want a fast reply, don't PM me but post a topic instead. PM me for private or personal topics only.