After enabling Files on Demand in OneDrive, some customers may see the following error when trying to access items in your OneDrive folder.
OneDrive cannot connect to Windows. Files On-Demand requires a connection to Windows in order to show your files without taking up space on this device. OneDrive can keep trying to connect to Windows or you can choose to download all your files. You won't be able to use online-only files until this is fixed.