All props in timeline are selectable all but characters are gone. If I take the project to my laptop with iClone 6.51, the timeline behaves as expected.
Motion Paths work with temporary fix....camera switching doesn't.
I have the same issue.
Sorry that was a rendered file here is a project file with the problem. https://www.dropbox.com/s/dbkopwd7qn00s53/Opening_1.iProject?dl=0
Here is the link to a file where I encountered the problem. https://www.dropbox.com/s/9wmrg5ilky115t6/scene_7.mp4?dl=0