Error: Google recaptcha verification failed. The resopnse parameter is invalid..

Sometimes, when I try to “sign in” in the login page, appear this message:
” Error: Google recaptcha verification failed. The resopnse parameter is invalid or malformed.”
I do not have idea how to fix it. Someone can help me?

I am using the plugin: “Simple Google reCAPTCHA”

• This topic was modified 3 years, 4 months ago by rrodrigofranco.

The page I need help with: [log in to see the link]