Configuration Page doesn't open correctly

-- HikaShop version -- : 2.2.3
-- Joomla version -- : 3.2.1
-- PHP version -- : 5.4.4
-- Browser(s) name and version -- : Chrome 32.0.1700.107 m

Hi,
I hope that's the right Topic Category.
On backstage Configuration Page doesn't open correctly. All other categories are just fine it's just about Config. It looks like screengrab in the attachment and doesn't allow Saving changes.

Hi,

Please check at the end of the page if you have an error message displayed.
Otherwise, please check your PHP error log, I think you have a PHP fatal error.
With the error message, we will be able to tell more more about the problem.

I think it could be a memory limit problem, the configuration page is a pretty big page (at this moment you should increase your PHP memory limit in your web hosting PHP settings).

Regards,

Fatal error: Call to undefined function ImageCreateFromPNG() in /var/www/joomla/administrator/components/com_hikashop/helpers/image.php on line 790

Hi,
This issue is related to the one that you have through this thread .

Yeah, that's exactly what I thought when found the Error, Mohamed. Couldn't figure out how these two could be related. Now it's kind obvious as the Page stops and shows Error at Images section (where HikaShop defauld image with barecode should be present).
I've sent an email to OVH about GD extension, awaiting reply. We'll see what happens once it's installed.