"Error 560: An internal error occurred" for Acquia Personalization

Issue

In the Acquia Personalization Dashboard / Campaign sections, you may see this error: "Error 560: An internal error occurred."

Resolution

Check for the following:

1. Recently deleted / replaced site_id name.
2. If the deleted site_id is still used in Campaigns.

Correct any broken site_id's. 

Cause

An orphaned site_id or any modified elements being used at the Campaign section will cause the error.