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  1. DavidQuinnContrac

    SMB Free Twilio Auto-Setup Not Working (Exception has been thrown by the target of an invocation)

    Hi Yiannis, We have now identified a clear and reproducible cause for the Twilio auto-setup failure on 3CX SMB Free, and I wanted to share the findings for visibility. This issue is volume-related, not credential or API availability related. In our case, the Twilio account contained a...
  2. DavidQuinnContrac

    SMB Free Twilio Auto-Setup Not Working (Exception has been thrown by the target of an invocation)

    Hi YiannisH_3CX, Have you had a chance to look into this issue any further? I’m happy to run some additional testing using our free SMB account with the 100 numbers if that would help.
  3. DavidQuinnContrac

    SMB Free Twilio Auto-Setup Not Working (Exception has been thrown by the target of an invocation)

    Hi YiannisH_3CX, I’m encountering the error message “Exception has been thrown by the target of an invocation” right after clicking the Next button, following the step where I paste my account SID and token. Because of this, I’m unable to proceed further or view the numbers from Twilio.
  4. DavidQuinnContrac

    SMB Free Twilio Auto-Setup Not Working (Exception has been thrown by the target of an invocation)

    We plan to upgrade to an Enterprise license after this trial — we just needed to confirm that these numbers would work properly before making the commitment. Thanks for your help. I do hope 3CX’s partners make customers aware that adding too many numbers to a free SMB license can trigger...
  5. DavidQuinnContrac

    SMB Free Twilio Auto-Setup Not Working (Exception has been thrown by the target of an invocation)

    I asked our supplier your question, and they responded with the following:
  6. DavidQuinnContrac

    SMB Free Twilio Auto-Setup Not Working (Exception has been thrown by the target of an invocation)

    I asked our supplier to remove 99 numbers from the 100-number block on Twilio’s side. After that change, the single remaining number was adopted immediately using the Twilio auto-setup. It’s clear there’s an issue between 3CX and Twilio when using the auto-setup feature with a large number...
  7. DavidQuinnContrac

    SMB Free Twilio Auto-Setup Not Working (Exception has been thrown by the target of an invocation)

    This issue has been ongoing since 03/10/2025. The current error, “Service is unavailable, please try again,” is most likely related to today’s AWS outage. However, once AWS is fully restored, the original error — “Exception has been thrown by the target of an invocation” — will likely reappear.
  8. DavidQuinnContrac

    SMB Free Twilio Auto-Setup Not Working (Exception has been thrown by the target of an invocation)

    We recently set up the free SMB license to trial 3CX for our Australian users after purchasing numbers and a call package from Twilio through our supplier, Gradwell Communications (UK). Gradwell (via Twilio) provided us with the Account SID and Auth Token for use with the Twilio auto-setup...