ERROR for site owner: Invalid site key

Question

I created a reCAPTCHA key and disabled Verify the origin of reCAPTCHA solutions, yet I am still getting there error ERROR for site owner: Invalid site key.

How do I fix this?

Answer 1

Same here. It seems to work for me if I add at least one domain or localhost in the Domains list, but then uncheck the option under Domain Name Validation.

Answer 2

Right so it appears the reCAPTCHA unverified keys simply don't work and they don't seem to give a shit about fixing it. Ended up just specifying the domains.