I have developed a Meta app and I am encountering an error after successful authentication. During the callback got this type of error that they have blocked my url.

I have not engaged in any illegal activities. Despite trying different devices and URLs, I still receive the same error:

It seems that Meta is blocking URLs from ngrok and other similar platforms. I am unsure how to resolve this issue.

Has anyone faced a similar problem or have any suggestions on how to proceed? Are there any specific precautions or configurations I should be aware of to avoid this issue?

I have been using ngrok for local testing for quite some time now with no problem at all. But recently, when I set my webhook in my app's callback url, it says:

The callback URL or verify token couldn't be validated. Please verify the provided information or try again later.

The url and token is correct, the endpoint does not get hit when I am doing it from Meta. When I use postman to make a GET request to that same url, I can see the request on ngrok terminal and the vscode terminal too. But not when I am verifying it on Meta. Is Meta now allowing requests to ngrok? What can I do to avoid this?