403 API Error. Message: Forbidden

Our testing in staging has been working great, but now we need to go to production mode. But when i change the API key I get this message :

Request failed: [403] Client error: `POST [https://api.shotstack.io/stage/render`](https://api.shotstack.io/prod/render%60) resulted in a `403 Forbidden` response: {"message":"Forbidden"}

What is the problem ?

You need to change the URL endpoint to be https://api.shotstack.io/v1/render - with v1, not stage.