I've created two database maintenance plans. One for user databases and one for system databases. The backup job for the users databases runs flawlessly. The backup job for the system databases generates the following error listed below. Any suggestions?

Microsoft (R) SQLMaint Utility (Unicode), Version [Microsoft SQL-DMO (ODBC SQLState: 08001)] Error 0: [Microsoft][ODBC SQL Server Driver][Shared Memory]Invalid connection.
[Microsoft][ODBC SQL Server Driver][Shared Memory]ConnectionOpen (Invalid Instance()).


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