OneDrive for Mac Sync Issues

I have used OneDrive on my Mac via an external hard drive for several years.  After a recent update, It refused to link to my folder on the external hard drive.  I decided to link my OneDrive to my iCloud account which seemed to work.  Today, a new update to OneDrive won't work now either.  These updates keep getting worse.  My External drive is encrypted, and case-sensitive and File Vault is on.  I would love any suggestions or ideas to get this back to work.  All I get is Can not locate the folder in this location,  Ugh.