Reuse a screencast from another Storyline project

"From Another Project

To reuse a screencast from another Storyline project, import at least one of the step-by-step slides from the original project into your new project. This makes the entire screen recording available in the new project, and you can reuse it as often as you like—either as a video on a single slide or as step-by-step slides."

The above feature is not working. When I import one or more step-by-step slide in a new project it appears blank. And in the recording also it is empty.