Named Pipes Provider error: 40 - Could not open a connection to SQL Server. (4291539)

Error occurred trying to set up log shipping:

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server).

Permission issues.

Make sure the SQL Server Service Account and the SQL Server Agent Service Account are run under the same domain account and have permission on the both the Publisher and Subscriber servers. The accounts must be able (have the right) to access the other master and msdb database, to call system procedures, to create jobs and have full permission to access LiteSpeedLocal Database.

Or, login into the same domain where the publisher and subscriber reside.