Hey Everyone.
We just upgraded our UAT SMG Control Center to version 10.9.1-3, and FTP backup stopped working.
When we run Backup Now, we get this error.
Cannot backup the database.
FTP:Can't log in: User cannot log in. ERROR: Unable to send to the specified URL.
All the backup settings, the FTP account and password are the same. We use the same settings on the Prod SMG Control Center which is still version 10.9.0-3, and FTP backup still works fine there.

Have any of you run into this problem?
We have already tried upgrading to version 10.9.2-6, hoping that it would fix the bug, but it didn't.
Also we have tried to use the workaround described in this article, and it didn't help either
https://knowledge.broadcom.com/external/article/281550/unable-to-create-the-backup-on-remote-se.html
This article says that the problem could be caused by our FTP server running in PASV mode, but I checked, and our FTP server has PASV turned off, as indicated by the port range 0-0.
https://knowledge.broadcom.com/external/article/155142/a-backup-of-the-symantec-messaging-gatew.html

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