After loading the creation kit and selecting the Skyrim Esm file I'm getting this message.

MASTERFILE navmeshinfo 000028e37 Has a parent space, ignore.

Just wondering what it means as it dosen't hapen in the tutorial video.

Same here, getting all these warnings. Only Skyrim.esm loaded. Zero mods. What do these warnings mean?

Just say yes to all, I'm pretty sure they're artifacts in the data.

apparently, those warnings are supposed to be harmless.

This is correct...just click yes-to-all....the kits have done this forever!

then again there are some problematic issues, when viewing certain things/cells.

Funny how the warnings didn't appear in the tutorial videos.

Or perhaps they cut them out from the videos in post editing.