In the Admin panel, Spam section, check these 3 options :
In the admin panel you will have a new section ("Approve users") where you will be able to approve or block the users.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.