Prestashop Class 'Smarty_Internal_SmartyTemplateCompiler' not found in

Fatal error: Class 'Smarty_Internal_SmartyTemplateCompiler' not found in /public_html/tools/smarty/sysplugins/smarty_internal_template.php on line 713

/* Please do not use LC_ALL here <a href="http://www.php.net/manual/fr/function.setlocale.php#25041">http://www.php.net/manual/fr/function.setlocale.php#25041</a> */
setlocale(LC_COLLATE, $locale.'.UTF-8', $locale.'.utf8');
//setlocale(LC_CTYPE, $locale.'.UTF-8', $locale.'.utf8');
setlocale(LC_TIME, $locale.'.UTF-8', $locale.'.utf8');
setlocale(LC_NUMERIC, 'en_US.UTF-8', 'en_US.utf8');