message: Catch errors during CAPTCHA verification
  (fixes
diff: @@ -39,6 +39,8 @@ captchas.verifyCaptcha = () => (req, res, next) => {
  } else {
  res.status(401).send(res.__('Wrong answer to CAPTCHA. Please try again.'))
  }
  + }).catch(error => {
  + next(error)
  })
  }
  