reCaptcha
The captcha that is running on Enrollware is an "invisible" one. Approximately one of every 8 people will see a challenge image asking them to identify streetlights, crosswalks, or cars to make sure the user isn't a bot.
Users can check the "remember me" box when they login so they only have to go through the captcha process infrequently.
Troubleshooting
If you encounter an issue please clear your cache and cookies, reboot, check your connection, disable VPN, make sure you are not running any privacy extensions or other network blocking (DNS ad blocking) that interferes with Google's reCAPTCHA and try a different browser. Unfortunately, we are not able to recreate any errors as this is hosted on Google's end.
Here is an explanation of reCaptcha by Google - https://www.google.com/recaptcha/about/