XF Cloud: hCaptcha Error

I'm seeing the following errors since yesterday am in Xenforo cloud. It looks like it's failing on the registration page. There has never been a site/secret key in the config. What's happening here?

Code:

#0 src/XF.php(219): XF\Error->logError('hCaptcha config...', false)
#1 src/XF/Captcha/HCaptcha.php(122): XF::logError('hCaptcha config...')
#2 src/XF/Mvc/Controller.php(967): XF\Captcha\HCaptcha->isValid()
#3 src/XF/Pub/Controller/Register.php(415): XF\Mvc\Controller->captchaIsValid()
#4...

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