When adding an Email Link for a Soapbox Mailer campaign, you might receive an error message that says the following information.
Error: Invalid Data.
Review all error messages below to correct your data.
Apex trigger sbm.InsertEmailLink caused an unexpected exception, contact your administrator: sbm.InsertEmailLink: execution of BeforeInsert caused by: System.ListException: List index out of bounds: 0: Trigger.sbm.InsertEmailLink: line 19, column 1
Here's a few items to check to troubleshoot this issue.
1) Ensure that your Site's Name is "sbx_EmailTracking" by going to Setup > App Setup > Develop > Site > click on Soapbox Mailer Email Tracking link, and confirm that the Site Name value is "sbx_EmailTracking".