The select permission was denied on the object 'sysjobs', database 'msdb', schema 'dbo'.
I have already tried to grant
sqlagentoperatorrole and it didn't work. How do I resolve this error?
You use the "SQL Server Agent Fixed Database Roles" in msdb (MSDN link).
And a "how to" for SSMS: "How to: Configure a User to Create and Manage SQL Server Agent Jobs (SQL Server Management Studio)"
Note: you need a user (MSDN) in one of these roles: no need to GRANT rights to sqlagentoperator