Hi WESTCODE_PE,
Thanks for posting in the community.
According to your description, the error message pops on when you use the OneDrive client to sync a SharePoint site/library.
Please view the scenarios and try the suggestions in the reference: "Sorry, OneDrive can't add your folder right now."
If the issue still exists, I would like to collect more information.
- Is the user able to access the SharePoint site/library in the browser?
- Do other colleagues have the same issue?
- Please try to create a new library and use the OneDrive client to sync the new library. After that, check whether the error message pops on.
- The OneDrive client version
If you have any updates or concerns, please feel free and come back to share with us.
Regards,
George