Conga is unable to communicate with Salesforce.
What To Do
- Ensure “Lock Sessions to IP Address from which they originated” is disabled (Setup > Administration Setup > Security Controls > Session Settings).
- Verify that the Session Timeout value is at least 30 minutes.
- Ensure the Conga Composer URL contains an “&Id=” parameter and that it is set to a valid Id.
- Don’t try to “Preview” a Conga Composer button. You must click it from a Salesforce record.