This short article shows you one way to resolve the OneDrive for Business Sync Problems.
Not sure why I got a Sync Problems for my OneDrive for business like the one below.
I could not find any solution in the Internet. What I did was.
1. Exit OneDrive for Business.
2. Open OneDrive for Business in Browse and click the Sync button like this https://chanmingman.wordpress.com/2015/08/06/client-for-onedrive-for-business/.
3. Specified the folder to Sync again then it will resync and the problem should be resolve. This might take some time depend on how big are your files.