We're experiencing a critical issue with our outbound calling system that started this morning. Our healthcare scheduling application was working fine yesterday, but as of today, outbound calls to patient phone numbers are not being placed. Issue Summary: - Outbound calls were functioning normally yesterday - As of this morning, no outbound calls are actually being placed to patients - Our API logs show call requests are being made and processed - Some API responses show 201 status codes (suggesting success) - However, no calls appear in actual call logs - Recipients are not receiving any calls and our corresponding UI isn't reflecting timestamps confirming calls aren't being made Error Details: - API Response: 201 (success) - Miscellaneous field shows: Error {"message":"Bad Request Exception"} - No corresponding entries in call logs in vapi dash - No actual calls being placed to phone numbers What We've Checked: - API credentials and authentication - Phone number formatting (E.164) - No changes made to our code since yesterday when it was working Could you please investigate why we're seeing successful API responses but no actual calls being placed? Any insights into what might cause a 201 response with a "Bad Request Exception" in the miscellaneous field would be greatly appreciated. Please let us know if you need any additional information from our logs or configuration ||ordID 86f6526d-1939-48c7-aadc-7dc98d81e8e7||