I have been using dropbox for more than 5 years without any issue. Recently when i opened in Dropbox.com, I am not seeing my Mac folder which was syncing. Instead i am seeing that as a Backup (dont know whether it is syncing). Also when i open dropbox app on cell, this folder dont showup and cant access my Mac. I also checked on Selective Sync, there also Mac folder is missing. What could be the issue