Fix the problem on the site on Joomla

Http://stroykomplekt.poltava.ua/ website

Recently there was a problem in photo editing, prices, categories etc.

In the admin panel - not actively

Locally tried to edit the category of the terrace board http://stroykomplekt.poltava.ua/terasna-doshka

There was no such problem before.

The task: to understand what happened, to correct.