internal error occurred

Hi,
I’m not sure about this issue, you can send me username & password of your site (via private answer) for further checking.
Regards,

This is an reCaptcha internal error that occurs when the domain hosting recaptcha scripts changes without the new domain being enabled in the reCaptcha key. Your browser sends a request to google server using a public key and referer from your new domain (where it doesn’t work) which hasn’t been enabled for the reCaptcha key. That public key is linked to your old domain, thus your browser will execute the recaptcha script and in return it will get a reject from the server.

Fix reCaptcha "An internal error occurred"

Go to https://www.google.com/recaptcha/admin and submit the new domain to the key.
Hope this helps !

I have helped you resolve the issue with reCaptcha, you can check & test to submit some questions on your site. Please tell me know, if you still face there issue.

Regards,