Moved to the InDesign forum. They will be able to help you here.
We had a thread about this a while back. Do you have and alternate layout added to the file (I get that feeling fom the options in the dropdown you showed)?
Are you able to type anything into the range field?
What do you mean by an "alternate layout?"
Actually, I am able type in that field - did not realize that because of the way presented as a drop-down. Normally I'm smart enough to try the obvious - sorry about that!
Alternate layouts are used for things like horizontal and vertical orientations of the same layout for use on tablets. I suspect there's some coverage in the Help files -- being a print guy I don't mess with them.
It may be that you only have one layout and ID just shows you that one inthe dropdown. I can't recall that I ever used the dropdown to try to select the range -- I always just type what I need in the field.