It seems there is some other plugin that caused the issue. Please deactivate the plugins one by one and check after each deactivation to find a problem maker.
First of all please deactivate all cache plugins and the plugins that have relation to user registration.
In case you want to say thank you! 🙂 We'd really appreciate if you leave a good review on the plugin page. This is the best way to say thank you to this project and the support team.
Then please send the admin login details to info[at]gvectors.com email address. I'll ask the developers to check the issue for you.
In case you want to say thank you! 🙂 We'd really appreciate if you leave a good review on the plugin page. This is the best way to say thank you to this project and the support team.