Salesforce Messaging for In-App and Web Can’t display conversation Exception

The root cause is that “Fallback message” was enabled under Messaging Settings.
 • Fallback message is intended to show a message to customers in the conversation window in the event of service downtime.
 • When we disabled the fallback message and re-published the Embedded Service Deployment, the error should disappear and the chat should start loading normally again.

Still Experiencing the Issue?
If the problem persists after completing the above steps,  Please open a support case with Salesforce Support for further assistance.