Problem with editing a article

Hi 
After I want to make some change/edit or add a new article (in properties category) I get an error after clicking the save button
 

Hello,

I tested this on our server and the article edits and saving works correctly. Please check all the extensions you installed after the template installation. One of them probably makes this problem.

Regards,
Milos

HI 
I made only an update to 4.0.5 and I installed language PL.
I can give you a login and pass to check on my hosting ??

Hello,

Please provide superuser access to your site.

You can post hide this on the forum privately if you select a part of the text and click the "lock" (confidential) icon.

Thanks,
Milos

Hello,

I don't know the Joomla administrator's panel link of your site.

Thanks,
Milos