And ... Did you setup your quest (properly) using Aliases before you got to the Radiant part?
http://www.creationkit.com/Bethesda_Tutorial_Quest_Aliases
^^^ That's great advice ... but it's a bit silly to put it after the first set of tutorials ... Teaching you to make things the wrong way first is also a silly idea ... So if you aren't using the Aliases properly in your quest/scripts, then adding the radiant system into the mix isn't going to work.
Read that page weeks ago...nothing in there seems to relate to this particular problem, which is: I'm getting an error on the quest aliases..when every single one is either a "Find" type or a "Create" type.
1 = Find: A location with a boss container.
2 = Find at the Location: The Boss Container we made sure was there.
3 = Create the quest item in the boss container from step 2.
I see nothing in that sequence that I've implemented "wrong" in any way, but the CK still whines at me.