K2 Can't publish Comment

Hi everybody,
Comments with K2 in my website worked well. And then suddenly I can not publish any comment.
If I try to publish my last comments in front of the website I get this information:

"Forbidden
You don't have permission to access /administrator/index.php on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request."

Can someone help me please.

I think the K2 support forum is better place to ask this kind of questions. Please try to reinstall K2 component.

Hi bkrztuk,
Thank you for your assistance. With the reinstallation, I am always afraid of losing data! You think that there are risks?

Have a good day.

First of all you should create a backup, if you run package via Joomla installer it should overwrite files and not delete any data.

Thank you bkrztuk for the informations.