Review the following steps to help identify and fix the issue:

1. Check the file path length: File paths must be fewer than 255 characters or OneDrive will not be able to recognize them.
2. Check the supported filename and file size limits: Try to make sure the file is smaller than 15GB and has a supported filename (anything other than a .tmp).
3. Check if the error is related to restrictions beyond what OneDrive can recognize: Certain files are blocked from being uploaded due to their extension or where they were created (e.g. Word docs from a shared drive).
4. Check if the issue is due to a lack of storage space: Make sure to free up some storage by removing large files from OneDrive or verify that the account has enough available space.