Believe that can happen if reCaptcha is loaded twice. You likely have something else loading Google reCaptcha JS. If you've reCaptcha enabled within Joomla then turn it off.
Kyle (Krileon) Community Builder Team Member Before posting on forums:
Read FAQ thoroughly
+
Read our Documentation
+
Search the forums CB links:
Documentation
-
Localization
-
CB Quickstart
-
CB Paid Subscriptions
-
Add-Ons
-
Forge
-- If you are a Professional, Developer, or CB Paid Subscriptions subscriber and have a support issue please always post in your respective support forums for best results!
-- If I've missed your support post with a delay of 3 days or greater and are a Professional, Developer, or CBSubs subscriber please
send me a private message
with your thread and will reply when possible!
-- Please note I am available Monday - Friday from 8:00 AM CST to 4:00 PM CST. I am away on weekends (Saturday and Sunday) and if I've missed your post on or before a weekend after business hours please wait for the next following business day (Monday) and will get to your issue as soon as possible, thank you.
-- My role here is to provide guidance and assistance. I cannot provide custom code for each custom requirement. Please do not inquire me about custom development.
That's it I use a contact form from: Perfect AJAX Popup Contact Form
In fact I have 2 pop up contact form with recpatcha from Perfect Ajax popup if i desactive the both the recaptcha of CB is working.
So I can't use recapcha in the popup contact form ..
krileon wrote: You likely have something else loading Google reCaptcha JS. If you've reCaptcha enabled within Joomla then turn it off.
Joomla Global Config has the options for Default Captcha: -None-, Captcha - ReCaptcha, and The New Recaptcha. "Captcha - ReCaptcha" cannot be found in Joomla Plugins anymore (it used to be). "The New Recaptcha" was now default in Joomla Global Config. Turned that off, and AntiSpam started rendering the ReCaptcha again (after a forced refresh to clear the cache).
krileon
.. 
.