I have weird problem on a private wiki in my company. Placed a NoCaptcha on create account form using ConfirmEdit. Eveyrime people try to create an account with a correct captcha, they get 'Incorrect or missing CAPTCHA.' Is this a bug?
Topic on Extension talk:ConfirmEdit
Maybe it has something to do with trying to use NoCaptcha on a closed network?
Same issue on an open wiki. It used to work but now 'Incorrect or missing CAPTCHA.' comes up when editing pages...
I suspect recent changes in Google's CAPTCHA are to blame. Here is a bug with a patch to try: Phab:T160262