After follow all the steps this message appears in the homepage:

ERROR: Your Username or Order Number is missing. These are requirement DATAs for license validation.

But I have not access to the administrator zone, there is a blank page in mydomain.com/administrator

The domain is catacrack.cat

What can I do?

It is the most weird situation i have ever seen.
I am really wondering how it happened

Let me explain.
Everything is working, and there is no blank page problem in your backend. Look at the screenshots because it is hard to explain this by using words ;)

This is not something like that comes with our VM Template. Definitely something else must trigger this which i have no freaking idea.

Look what i got here: forum.joomla.org/viewtopic.php?f=579&t=795411

The same exact problem, the guy suggests:

Solution: comment line
Code:(line 671st) in libraries/joomla/html/html/behavior.php

(basically replace that line with:

Try it, it should fix the problem.

Regards.

Hi, thanks for your quick and kind reply.

Can we make a try? I can do it all ready for the new installation for you, and I suggest you install it, perhaps I made a wrong step during the installation process.

I could send you the installation details by email?

Thanks.

Did you try this?

Open this PHP file:

ROOT/libraries/joomla/html/html/behavior.php

Look at the (line 671st) and find this line:
replace it with this:
It will solve the problem. (tested and confirmed)

Regards.
Support & Development

This did not work for me. I changes the behavior file, but the admin part is still blank?

www.ceramicfactory.co.za/administrator/

Here is that part in my behavior file:
$document = JFactory::getDocument();
// $document->addStyleDeclaration('html { display:none }');
$document->addScriptDeclaration($js);

Hi Rudolph,

As i am seeing in your website, you managed to solve the problem.
But you also say the solution I have provided didn't work out. Could you please tell us what you have done to solve it?

Regards.
Support & Development