Hello eradriver,
I understand you're experiencing the "Unable setup call. Please try again to rejoin" error with the Talk To Assistant function, and this is urgent for your project.
This error can be caused by several issues including Twilio configuration problems, assistant ID misconfigurations, insufficient account credits, or network connectivity issues.
To help troubleshoot more effectively, could you please share which specific configuration you're using (Twilio phone number, direct API calls, or SDK implementation) and if you've made any recent changes to your setup before the error started occurring?