(solved)front panel doesnt work, back office is ok after upgrade !!urgent Help!!

[makaraci]

hi,

after upgraded from 1.1 to 1.3.1, there is a completely blank page on the front office.But back office works perfectly.

I regenerated htaccess but nothing changed. help me please.

error : hack attempt

PS : i tried prestahop offical tema and my custom theme but none of them works

PS 2 :
PS : i edited config/config.inc.php and changed ‘display_errors’ from ‘off’ to ‘on’ .

The error :

Fatal error: Call to undefined method Db::getInstance() in /home/xxxx/public_html/classes/Meta.php on line 89

[makaraci]

i added to init php this code on the line 89 :

$ps_language = new Language(intval($cookie->id_lang));
setlocale(LC_COLLATE, strtolower($ps_language->iso_code).'_'.strtoupper($ps_language->iso_code).'.UTF-8');
//setlocale(LC_CTYPE, strtolower($ps_language->iso_code).'_'.strtoupper($ps_language->iso_code).'.UTF-8');
setlocale(LC_CTYPE, 'en_EN.UTF-8');
setlocale(LC_NUMERIC, 'en_EN.UTF-8');

problem is solved !!!