Lefteris Kavadas wrote: Check that your template overrides have the correct code inside them ( as the default layouts that are bundled with K2).

how come it works ok on my laptop, but on my website the exactly same template (the same files) is not wiorking?

my overrides file is the same empty on my local computer and on my websit

Any different settings between your laptop and the server? Is caching enabled?

The setting is not working even without template overwrites (so it is probably a bug).
User has been assigned to K2 group that has the right to comment, but the form doesn't appear.

OK, I think I know what it is. It is a slight change in logic from previous versions.
In previous versions, if the setting to comment was for registered only, it was ignoring the selected categories in the user group.
So one could comment in all categories, but add content only in the selected for his user group.
Now it is impossible to have the default user group for K2 to be able to post comments everywhere, but add content only in selected categories.

Ok, i know, where the problem is.
Every new user belongs to Registered Joomla Group, but not to Registered k2 Group. How can i change it, that after register new user belongs to Registered k2 Group by default?

@Szagun

Go to K2 parameters and set the default K2 user group for new users. Also make sure that the User - K2 plugin is enabled.

I checked it and it's correct. But still i have problem...
After registration new user doesn't belong to any group and i have to change it from BE.
There is a screen of the new user after registration.

Can anyone help me? I am not able to solve this problem...

I fixed the problem, because i changed the login module: from joomla module (default) to k2 User and now it works. But i have another problem: how can i enable login with facebook through k2 User module?

@Szagun

There is no facebook integration in the K2 User module. You need to either find a plugin or place the needed code in a module override.