SQL Server Integration Services (SSIS) Package Failing with no error
Working backwards from the job, have you been able to run the package straight from the server? In older versions of SQL Server it might be in the Integration Services server, that you can connect to through Management Studio, or in newer versions of SQL Server it could be in the Integration Services Catalog on the database server. If you can run the package directly through there, then I would take a look the job credentials, or any configuration settings that are being set in the job. If the package fails when running it directly, then it may be the package itself that's the problem, which then I would go back to running and troubleshooting it from Visual Studio\BIDS to see where the problem is occurring.

On a more unusual path, if the package is doing a lot over an unsteady network, then you might be getting network related problems, or timeouts that aren't being reported as such to SQL. This might need you to get creative in staging data or breaking up the tasks into smaller packages and then calling those packages as additional steps.