Contact Form 7 WP PLugin Shows Error when Info is submitted in form. The error is not present when Civi CRM is disabled
This is really digging back into the cobwebs for me but... I had a very similar problem that I think popped up when we set up SSL. I think that in the Form settings, under the Mail tab, I had to remove the To &amp; From mail-tag and just use my actual email address. I may have ended up deleting the current form and creating a new one.