I am trying to set up an account to use Marketing Messages feature: https://developers.facebook.com/docs/messenger-platform/marketing-messages
But I am getting the following error when trying to send a "Sample Opt In Request": {'error': {'message': '(#10) This account is not eligible for the Recurring Notification IG Beta', 'type': 'OAuthException', 'code': 10, 'error_subcode': 2534089, 'fbtrace_id': 'A5TA9kaWh47ovaso9cM79Lm'}}

In the test version, the messaging_postback function of the webhook is not working. It was functioning perfectly until a few weeks ago. Although I can see that I passed the payload to the button through messaging_echo, I do not receive any response through the webhooks.
Can anyone help with this? What could be causing the error?

I have implemented postback button like
"payload":{
"template_type":"button",
"text":"Try the postback button!",
"buttons":[
{
"type":"postback",
"title":"Postback Button",
"payload":"DEVELOPER_DEFINED_PAYLOAD"
}
]
}
Button is showing in messenger but when i clicked on it, it did not sent the payload to my API. If i type any message and send it, that message sending to my API. URL open and make a call by button click are working, only postback button is not working.
subscribe version for messaging_postbacks is v18.0, App Mode is Development and my app is not business verified.

Hi all,
We're developing the customer feedback feature by using built-in Customer Satisfaction template with Free form input. After we tested on the IOS/Android messenger application it works as expected, but on the web browser(Edge & Chrome) the free form input is not displayed as in the attached screenshot. If there is a way to make it display on the web browser, I'd really appreciate it.