Flask сервер постоянно выдает 404 и 405 ошибку

@app.route('/', methods=['POST', 'GET', 'DELETE'])
def incoming():
    logger.debug("received request. post data: {0}".format(request.get_data()))
    # every viber message is signed, you can verify the signature using this method
    if not viber.verify_signature(request.get_data(), request.headers.get('X-Viber-Content-Signature')):
        return Response(status=403)
 
    # this library supplies a simple way to receive a request object
    viber_request = viber.parse_request(request.get_data())
 
    if isinstance(viber_request, ViberMessageRequest):
        message = viber_request.message
        # lets echo back
        viber.send_messages(viber_request.sender.id, [
            message
        ])
    elif isinstance(viber_request, ViberSubscribedRequest):
        viber.send_messages(viber_request.get_user.id, [
            TextMessage(text="thanks for subscribing!")
        ])
    elif isinstance(viber_request, ViberFailedRequest):
        logger.warn("client failed receiving message. failure: {0}".format(viber_request))
 
    return Response(status=200)
 
if __name__ == "__main__":
    app.run(host='127.0.0.1', port=5000, debug=True)