Ayuda: no puedo ver mi tienda, pantalla en blanco prestashop 1.6

[julbroa]

Hola, no puedo ver mi tienda.

Puedo entrar al backoffice pero la tienda no lo puedo ver. aparece pantalla en blanco.

la tengo en esta url: http://www.compusya.com/productos

 

El archivo index.php trae este contenido:

 

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