I have same problem!!!
I can’t add any my acount business of OneDrive
Any time the same problem.
Pls resolve this issue urgently
We use the same version 12.5.5 of SQLB&FTP
We have fixed that issue in the Alpha edition. Could you please install it http://sqlbackupandftp.com/download/alpha and check if it works for you?
Sorry for the inconvenience.