Hi,
I installed the wpDiscuz Plugin, and enabled it.
The CAPTCHA image is seems to be broken. without that image, the user is not in a position to post a comment.
(Please check the attachment for the screenshot)
I may suggest you hide the CAPTCHA field at all. It seems the lib isn't loaded in your case. The option is located in the Dashboard > WooDiscuz > WooDiscuz > Show/Hide Components admin page.
In case you want to say thank you! 
We'd really appreciate if you leave a good review on the plugin page.
This is the best way to say thank you to this project and the support team.
Thanks for your reply,
Actually, Now that's what I have done. Hidden the CAPTCHA,
But if we have that option, can control the spams.
I may suggest you try the Akismet plugin.
In case you want to say thank you!
We'd really appreciate if you leave a good review on the plugin page.
This is the best way to say thank you to this project and the support team.
