Thanks for the quick response Greg (y). I extended api v1 access through an API Ticket J.
Yes, I recieved an email that api v1 gonna be deperciated and dropbox won't give any support on api v1 but I never thought dropbox will completely shutdown it . I migrated many of my v1 calls to v2 but some are left which created chaos in live environment. Well now I am migrating all the remaining v1 calls to v2.