Sorry to dig up an old thread but having completed the migration to the new SQL server back in late May, I finally got around to deleting the original server VM when no issues were encountered after 60 days. NOW, however, it's been realized that there are some Jobs (under SQL Server Agent in the SSMS) and that they've all been failing since shortly before the cutover. Looks deeper into the logs, I'm seeing "Could not load package "Maintenance Plans\Daily Backups and Cleanup because of error 0xC001000A. The specified package could not be loaded from the SQL Server database".
Sure enough, when I look under Management -> Maintenance Plans in SSMS, I see absolutely nothing. My assumption now is that these backup jobs are referring back to something that used to be in the Maintenance Plans folder of the old server but that I didn't know about/never copied over. And now the old server is gone. Is there any way to recreate whatever was in the old Maintenance Plans folders from the last server, or am I SOL at this point and will need to figure out what 'used' to be in there and create all new backup jobs going forward?