Cannot add Products to a category

-- HikaShop version -- : 2.3.4
-- Joomla version -- : 3.3.6
-- PHP version -- : 5.4.19
-- Browser(s) name and version -- : Firefox 33.0
-- Error-message(debug-mod must be tuned on) -- : No error message. It just doesn't do the job!

I have been struggling to add a product to a category.
Basically I go the product.
Click Categories -> Add
Select the category I want to add it to.
Click OK
It shows a new screen I don't remember seeing before.
When I close it there is no change to my product category whatsoever.

I attach screen shots of the whole process.

In fact, I see this is happening with most things. I noticed it also when trying to add variants to a product too.
Also I am struggling to upload photos for the same reason.

Hi,

This indicates a javascript error on the page.
Could you please like that the javascript error console of your browser while you do that process in order to get the error message corresponding to the issue ?

Now I am venturing into the unknown....
I have attached a printscreen of what I think you want.

Hi Nicolas,
According to my friend this is more what you may be looking for:

Use of getAttributeNode() is deprecated. Use getAttribute() instead. mootools-core.js:108
TypeError: window.hikashop.ready is not a function index.php:911

Please can I get a response on this. What should I do? I cannot capture my shipment properly at the moment.

I suspect you have old version of media/com_hikashop/js/hikashop.js
Could you open this file and check the @version at the top?

* @version 2.2.1
I think

If I'm correct, you are using Hikashop 2.3.3, but js file is from Hikashop 2.2.1.
You can, update to Hikashop 2.3.4 ( don't forget to take a backup, just in case) and js file should be also updated.
Or extract media/com_hikashop/js/hikashop.js from Hikashop 2.3.3 installation package and upload it .

I checked out also other js files and it looks like you have mix of files from several versions.
You should update all js files from media/com_hikashop/js/ folder to the same version.

Thank you so much.
This has worked and solved our problem completely.