I have accidentally deleted my activity, I knew that I could revert to a previously saved version so I followed these instructions -
To see the versions saved for a given file, go to the Creative Cloud Assets page and sign in. Navigate to the file you’re interested in, and switch the view from the Details panel to the Activity panel. There you can view all comment and version activity for the file. Clicking on the versions in the list will let you preview the version and provide an option to restore it.
But I am not getting the option to click on the Activity panel, this is what I am seeing.