I see two different errors in that message....

1. Permissions Issue

2. Server/Instance connection issue

Can you make sure the account which you're using to run the job has sysadmin rights.....

For the second error ... Check the connection(server info and authentication) within the package to make sure it is connecting to the correct server and has right permissions for that account .....

If you see no issues till here ... please look into SQL Server Error Logs to see if you could find any additional information.....