I've implemented GCP dialogflow es with whatsapp api, at the moment of testing the message dialogflow receives the message and it replies back which the reply back fails, also the authenthication of my sole propriatorship is now over a month and nothing seems to happen, Just I want to have automated replies on my whatsapp business! I've registered a whatsapp business app, number account, I might be a little confused with the process but there's no one to reach out to!

this set up is cloud hosted api, for my number.