When I select “Open Recent Files…” and choose a recent file that also happens to be one the iCloud has decided to store in the cloud to manage space on my hard drive…Layout doesn’t know to request a download when trying to open it. This might also occur with other cloud storage services, like OneDrive, Dropbox, etc. I don’t know.
The problem goes away when I download the file first.
The much bigger problem is that when those files that are stored in the cloud are one of those linked to the layout document (an image, a model, etc) - Layout doesn’t know how to cope with that, when it cannot load them. I think it is at the core of the occasional hangs and crashes.
The only option I seem to have is to go to the Document Info and track down each reference/linked file and then manually go and download it.
Please find a way to manage the cloud-based files that are related to your layout files.