Prestashop problema

Sveiki, iškilo bėda su prestashop'u. Pradėjo mesti klaidą pridedant betkokią prekę, į krepšelį, už pagalbą atsiskaitysim.

Impossible to add the product to the cart.
textStatus: 'parsererror'
errorThrown: 'SyntaxError: Unexpected token <'
responseText:
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