Trying to Get an Email Campaign Stats Report

Hello, 

I see that you released the endpoint for get an email campaign stats report, thanks.

But when i try to get the stats report using some campaign ids already created i get this error:

Those are valid v3 campaign_id

I'm following this documentation:

https://v3.developer.constantcontact.com/api_guide/email_campaign_stats_report.html

https://v3.developer.constantcontact.com/api_reference/index.html#!/Email_Reporting/getEmailSummary