dev mode - trouble using prestashop : blank page without errors -

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i met trouble while using prestashop.

i've sent message forum nobody seems know trouble.

the fact have blank page in front office. office works fine.

i've set debug mode on that

define('_ps_mode_dev_', true);

i've clear smarty cache, etc... , force recompilation, not display mistakes, not know show mistakes.

anykind of appreciable


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