Hello Quang Minh,

If you want to use JKit blogs and comments, etc. you need to provide JKit account register and login, not the joomla default.

Note our theme-packages are preconfigured to use the JKit user accounts, https://themes.cloudhotelier.com/flat/en/account

You will need to remove any default joomla account registration.

Kind Regards

I understand that some of you would prefer to use the standard Joomla system, but we have built JKit user account system as a modern account system to replace the (in our opinion) out-dated Joomla functionality.