Finding Invisible Recaptcha Callback Function


New member
I have a Captcha service for Captcha Bypass. The problem is the script works fine on most other sites , but this site does not have a callback function although it does have a callback. So how would I execute the Callback?

Here is my Code:
$CResponse = "uuuhuihhoihoihloi"
$browser.executeScript("document.getElementById('g-recaptcha-response').value = arguments[0];", $CResponse)
$browser.executeScript("___grecaptcha_cfg.clients[0].F.F.callback('arguments[0]');", $CResponse)

The error I get is Callback function does not exist.
Please help. Thanks