ReCaptcha plugin always show error message

Hello,
I'm always getting this message even if I already set the public key correctly in the backend.
"ReCaptcha plugin needs a public key to be set in its parameters. Please contact a site administrator."

Please Assist me.
Thank you.

If this errors are visible you probably set wrong keys, could you send us the URL to this site ? template is latest available version ?

I have the same issue, I have a lot of products on my site and I don't want to mess with that updating to the last version, could anybody provide a safe way to update the template?

TIA

Other solution is disable register module on pages where another recaptcha can exist so remind password page and all k2 items where reCaptcha is used for comments.