63007: Twilio could not find a Channel with the specified 'From' address

ERROR: 63007

PROGRAMMABLE SMS

ERROR

Sending a message using a From address that is not associated with any Channel or WhatsApp installation.
Sending a message using a From address for a Channel that is pending approval.
Using incorrect Account Credentials for the account that owns the Sender

See here for supported formats of Channel endpoint addresses.
To send messages using WhatsApp, the From address should be whatsapp:<sandbox phone number> or whatsapp:<your twilio number> . This can be found on the WhatsApp sandbox page or WhatsApp numbers page.
If you are using the WhatsApp sandbox, ensure that you have activated the Twilio Sandbox for WhatsApp. This can be found on the WhatsApp sandbox page.
Check your account SID and auth token are correct and correspond to the account that owns the Sender. You can find your account credentials in the Console here.