Backend article page quite empy (css) after update

-- HikaShop version -- : 2.5.0
-- Joomla version -- : 2.5.28

Hi, I experienced a problem I couldn't solve. I upgraded from 2.4.0 to 2.5.0 as it is always good to get the latest version before asking for help. It looks like my initial problem (finding an article to give discount) is solved. But it looks like another problem came in its place.

When I go to the backend article list and click on an article, I get a rather empty / incomplete page. See screenshot.
I tried to remove all the cache I could found (browser, Joomla, et cetera) and also did a DB check, nothing strange.

Hello,
Can you :
- Activate the Joomla debug mode ("Administration->Global configuration->System->Debug System/Language")
- Set the "error reporting" option of the Joomla configuration to "maximum"
- Test it again so that you can see if it display an error message which will help you to understand from what your issue is coming.
Thanks.

See attached screenshot.

I see two overrides. show_default and show_block_dimensions. Do you know which one is causing the problem?

I made the changes on purpose. I understand things change, but I don't want to loose all the changes I made (besides I don't know exactly what changes it were). Is it easy to downgrade back to 2.4.0? Or what's the best way to get this working without losing all the changes?

Of course, my fault. Problem solved. Nice new interface at the product page!