Hi @Benjamin, Shel
If there is any error message, please take a screenshot and share with us.
Could you please let us know how did you upload this folder to OneDrive?
- Such as syncing folder and files via OneDrive desktop app (https://apps.apple.com/us/app/onedrive/id823766827?mt=12 or https://support.microsoft.com/en-gb/office/onedrive-release-notes-845dcf18-f921-435e-bf28-4e24b95e5fc0#OSVersion=Mac) or uploading folder to OneDrive online (https://onedrive.live.com/about/en-us/signin/) directly.
- I would suggest you try both to have a check.
Then please check the file names for restricted characters, ensure you don't have any illegal characters such as . " * : < > ? / \ | included in the filenames you are trying to sync.
Besides, if there is any anti-virus software, it's recommended to disable it temporarilyd.
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