Storyline 360 couldn't recover assets

Hello JustynaPuchalsk,

I'm sorry you ran into this problem with your project file. 

Based on the screenshots, you encountered possible file or data corruption in your project file. This article lists possible causes of file corruption as well as how other authors reduce their risks of running into this issue. Working locally is one of the most common ways to reduce the chances of encountering file corruption. 

There might be a way to recover some of the assets in your course. Would you be willing to share a copy of your project file here or privately by opening a support case so we can check for you? We'll delete it when we're done!