Twitter Card Validator. Unable to render card preview

[hgarcia]

Hello

 

Prestashop 1.6.09 

 

I'm triying to setup  twitter cards for my store:

  http://tiendascancun.com/

 

I'm triying to validate, and request card aproval on the twiter card validator at:

 

https://cards-dev.twitter.com/validator

 

First of all i tried this module: 

http://www.prestashop.com/forums/topic/303217-module-free-prestashop-twitter-card-module/

 

After, I deactivate it and, by following the Summary Card directives 

https://dev.twitter.com/cards/types/summary

 

I put the code, for testing on header.tpl, just after the favicon tag:

<link rel="shortcut icon" type="image/x-icon" href="{$favicon_url}?{$img_update_time}" />
{* facebook tags*}		
<meta name="og:title" content="{$meta_title}" />   
	
{if isset($have_image)}
{if $have_image}
<meta name="og:image" content="{$link->getImageLink($product->link_rewrite, $cover.id_image, 'large_default')}" />    
<meta name="og:type" content="og:product" />
<meta name="og:description" content="{$meta_description} Adquierelo en linea ahora." />
{/if}	
{else}
<meta name="og:image" content="{$img_ps_dir}logo_fb.png" />        
<meta name="og:type" content="og:website" />
<meta name="og:description" content="{$meta_description}" />
{/if}
     
{* twitter card *}
<meta name="twitter:card" content="summary" />
<meta name="twitter:site" content="@tiendascancun" />
<meta name="twitter:creator" content="@tiendascancun" />
<meta name="twitter:title" content="{$meta_title}" />
<meta name="twitter:description" content="{$meta_description}" />
<meta name="twitter:image" content="{$img_ps_dir}logo_fb.png" />
<meta name="twitter:url" content="http://tiendascancun.com/" />

The first group of lines, are the Facebook OpenGraph Tags, wich worked me good on FB.

 

So, no matter what I do  , I allways get the same results on the validator:

 

"Unable  to render card preview" and "Error: internal server error"

 

 

 

I thought that the problem was because I used to have this store installed on a domain subfolder. I already change it to / (public_html), I also added to the begining of robots.txt the lines:

User-agent: Twitterbot
Disallow:

I'm running out of ideas. And Google does not like my questions.

 

Has someone had this problem?

Did you found a solution to share?

 

 

Many thanks in advanced.

Best regards