Beginning on 9/7/2015 my weekly backup started getting these messages:
[14-Sep-2015 03:04:26] 3. Try to backup database …
[14-Sep-2015 03:04:26] WARNING: mysqli::real_connect(): The server requested authentication method unknown to the client [mysql_old_password]
[14-Sep-2015 03:04:26] WARNING: mysqli::real_connect(): (HY000/2054): The server requested authentication method unknown to the client
[14-Sep-2015 03:04:26] ERROR: Cannot connect to MySQL database 2054: The server requested authentication method unknown to the client
[14-Sep-2015 03:04:26] ERROR: Step aborted: too many attempts!
I have not made any recent changes to my BackWPup job or to my underlying website. http://www.veresapiens.org