A Microsoft file hosting and synchronization service.
I don't know exactly what may be causing the sync problems. But generally speaking, you can't sync files to OneDrive if they are still open in an application. So go to Task Manager > Processes and "End task" of these applications and see if that helps with OneDrive syncing.
You have to have all files located in OneDrive in order to have complete OneDrive backups of your projects. For example, you need to sync your Documents folder to OneDrive if some project files are located in Documents. That's why portable project files are the best for backing up.
You may need to open the Adobe software first and then open the project from the software. That is my experience using the Movavi Video Editor. I open the Movavi Video Editor software first and then from the app I select the project that I want to open. If I go to the folder where the project is saved I can't seem to open it for some reason. Not sure why I need to do it that way.
Open adobe first then open the project from the Adobe application.