Hi @Bala,
Firstly, please make sure the internal users have enough permission to the library.
And as said in this article OneDrive sync error “Sorry, OneDrive can’t add your folder right now”, the possible causes for this issue may be:
- The Require Check Out option is enabled on the library.
- There are Required columns entries for the library.
- The Draft Item Security option is set to Only users who can edit items.
Please check the possibles causes and see resolutions.
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