This is the error:
TITLE: Microsoft SQL Server Management Studio
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The task with the name "Back Up Database Task" and the creation name "Microsoft.SqlServer.Management.DatabaseMaintenance.DbMaintenanceBackupTask, Microsoft.SqlServer.MaintenancePlanTasks, Version=15.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" is not registered for use on this computer.
Contact Information:
Back Up Database Task
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BUTTONS:
OK
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Install and use SSMS version 17.9 to resolve this issue.