@stevenjram I had that problem too. I reset the Recaptcha settings (actually took it off temporarily) and got it working fine afterward.
@takayukister as I said before your plugin setting for Recaptcha is messing up and not setting emails. The question is: is it from your plugin or something google did?
@takayukister I figure out what was making the CF7 error, the recaptcha settings of your plugin are messing up. I just took off, the settings of recaptcha and the forms are working fine once again.