You may receive this message if you have moved the file on your computer after an automatic upload has occurred. Shorten the name of your file or the name of subfolders in OneDrive, or select a subfolder that's closer to the top-level folder, then try to upload the file again. The filename and path must contain fewer than 442 characters.
The filename (including the path) is too long. OneDrive can't upload this file to this location Save any changes to the file, close the app, then try to upload the file again. Tap Force Stop then tap Clear data and Clear cache.
If OneDrive sync is not working or launching, or if the app is crashing, fix the issue by reinstalling OneDrive app.
