I'm sorry for the confusion this caused. We are aware of the 500 errors being returned for many campaign endpoints last week. We resolved the issue on 6/15, this Monday, so you may have seen the issue up to and including that date. For reference, here is the page acknowledging the issue. Sorry again for the disruption in service. http://developer.constantcontact.com/docs/api-issues-and-status/closed-issues.html --Issue WS6393.
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