Outbound call Forbidden

Hi, I am trying to build a demo for a client and every time I try to make an outbound call I get

An error occurred in this call: call.in-progress.error-providerfault-outbound-sip-403-forbidden
I need urgent help since we have demo after 2 days with a client
I followed everything in the guide
Call Id: 019ab5b4-354d-7006-8135-41b440b5c65b
Error: An error occurred in this call: call.in-progress.error-providerfault-outbound-sip-403-forbidden
I am trying Outbound only for now
I've Just purchased a new Twilio account and linked it to Vapi
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