Your Reject instruction does not include a valid activity_sid
parameter.
activity_sid
parameter in your
reject
instruction.
activity_sid
but it was invalid or no longer exists.
ActivitySid
value is is being passed by your code into the request payload JSON's
activity_sid
parameter:
{ "instruction": "reject", "activity_sid": "WA0123456789abcdef0123456789abcdef" }