21266: 'To' and 'From' numbers cannot be the same
PROGRAMMABLE MESSAGING
ERROR
You attempted to send an SMS, but the To
phone number you supplied is the same as the From
number.
You attempted to send an SMS from a Twilio number to itself (i.e. putting the same Twilio number in the To
and From
parameters).
Ensure you are not attempting to send a message from a Twilio number to itself.