Meta Webhook Test Leads Response Error

I'm facing an error when trying to send a test request. There is an error happening while testing for leads

Hello @aniketb,

As per the attached image, it seems that the issue is with the connection. Please try setting up the connection again and let us know how it goes.

To assist you further, we would require your workflow URL along with your permission to access the account. You can provide this in your next reply by stating, “You can access my pabbly account and make changes if required.”