This same thing happened to me a few weeks ago when searching for "Viquipèdia" when I refreshed the search, it worked normally. I have a theory about this problem; reading this thread, it is possible that this error of not finding results occurs the first time someone searches for a word in Kagi that no one has searched for before in Kagi. For example, in my case, "Viquipèdia," I highly doubt that anyone had made that search before, and when I refreshed, it worked, so it is not far-fetched that this could be the origin.