# AI Voice Assistant: Axios 404 Error – Webhook Not Registered

**URL:** <https://community.retellai.com/t/ai-voice-assistant-axios-404-error-webhook-not-registered/851>\
**Category:** Feature Requests\
**Created:** [February 14, 2026, 12:59pm UTC](https://community.retellai.com/t/ai-voice-assistant-axios-404-error-webhook-not-registered/851 "2026-02-14T12:59:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![pascal.schafstall](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/pascal.schafstall/32/772_2.png) [@pascal.schafstall](https://community.retellai.com/u/pascal.schafstall)\
**Post date:** [February 14, 2026, 12:59pm UTC](https://community.retellai.com/t/ai-voice-assistant-axios-404-error-webhook-not-registered/851/1 "2026-02-14T12:59:16Z")

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Hello everyone, unfortunately I have a small problem. I put together an AI voice with a YouTube video. I followed it exactly as in the video. However, when the assistant is supposed to check the calendar to see if the appointment is still available, it only sends me an error message with the following: “Axios Error: error code: ERR\_BAD\_REQUEST, error message: Request failed with status code 404 response status: 404 response data: [{“code”:404,“message”:“1”,“hint”:“2”},“The requested webhook “964a0d19-194e-4a3e-afce-08d6b252805d” is not registered.”,“Click the ‘Execute workflow’ button on the canvas, then try again. (In test mode, the webhook only works for one call after you click this button)”]”

Unfortunately, I don’t know how to fix this problem. Has anyone had experience with this?

Best regards,  
Pascal

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**Author:** ![abhay.babbar](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/abhay.babbar/32/1845_2.png) [@abhay.babbar](https://community.retellai.com/u/abhay.babbar)\
**Post date:** [June 8, 2026, 1:00pm UTC](https://community.retellai.com/t/ai-voice-assistant-axios-404-error-webhook-not-registered/851/2 "2026-06-08T13:00:35Z")

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Hi,

The issue is in you are using n8n workflow in dev, click on the publish button and use the webhook url that is under production URL.

 ![image](https://canada1.discourse-cdn.com/flex008/uploads/retell1/original/2X/8/86b6b334c56727db87187954804bd33aed7585bb.png)

 ![image](https://canada1.discourse-cdn.com/flex008/uploads/retell1/original/2X/1/169c9d8b820e9e5e1c96c4d697b7e8fe6e62e5cc.png)

Let me know if you need any further assistance.

Regards,

Abhay