We have conducted a review of your website and have determined that there are no issues with the user registration tab appearing on your site, as it is the same as the demo. We believe this to be a cache issue on your end. We suggest that you clear your browser cache and check back.
For further reference, please refer to the image provided at the following link: https://postimg.cc/jnHRbMbs
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.