Problem with back up

hi i try to make backup from my windows server of few files and database to other server account and i get this error:

data connection cannot be opened with this PROT setting (521)

what to do?

Hello,

Could you please clarify is SQLBackupAndFTP is installed on the same computer where SQL Server is installed?

If yes, please send us the Advanced Log. You can find a short tutorial on how to do it at https://sqlbackupandftp.com/blog/how-to-send-log-to-developers

Sorry for the inconvenience.