This article may be slightly helpful for you.
This feature don't give access permission of category to all registered users. This feature gives authorization to manage specific category to specific 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.