http://forum.textadventures.co.uk/viewtopic.php?f=10&t=5444&p=37779#p37779
As per the above forum topic, it appears that I'm receiving errors when Quest parses my game file that other people cannot reproduce (ie, it appears that Quest dislikes my syntax or something, but others don't know why).
I've uninstalled and reinstalled Quest to try to resolve the issue, but I continue to have the error. Maybe there's something I failed to initialize or a game setting I've failed to properly set?