Can't Add new Products or Categories

In joomla backend hikashop product area, when I try to add a new product or category instead of showing the normal configuration. only appears the text shown in the attached image.
I´ve added some after installing the component and worked fine, now it just doesn't work.
Please Help!

What HTML editor do you use ?
What version of joomla and HikaShop do you use ?
Could you try to change your HTML editor in the configuration of HikaShop on the main tab and try again ?

I've changed the editor and worked!
Many thanks!!!

I'm glad it worked. Which editor were you using ?

It was set in "standard", and I changed it to "Editor - no editor".

Standard means that it's using your default HTML editor in joomla. Did you install a specific editor or do you use the default one ?