The only time that this has happened to me is when I started a project outside of Edge... and then opened it in Edge...
Edge seems to lock some of the layers so that you can't move them.....
I believe this was created so that you could open an existing web page in Edge and add content in Edge without accidentally destroying or changing existing web page elements.
Thanks for replying.
I tried different ways. First I tried the tutorial that is included. Dragging not working. Then I tried opening Edge again and start a new animation. Still not working. I wanted to drag a layer on top of the other to make a parent child layer. Also not working.
It works! Didn't change anything. Just re-opened.
While working through one of the included tutorials I 'thought' I came across this problem -- but realized it was just a bonehead error - I was trying to drag what I thought were "elements" in the timeline (so I was actually trying to drag the actions).
I include this as a reply in case it might save someone if they so happen to be blind as I was! If this is you, look around, there's another window named "Elements" – That's what you're looking for.