Hi, since i uploaded sns camen, frontend is blank, backend ok

i have in my apache server log :
PHP Parse error: syntax error, unexpected T_STRING in /home/web/DOMAIN.fr/app/code/local/Sns/Camen/Model/Observer.php on line 1

In magento log : empty

magento Magento ver. 1.9.2.1
i did :
2.2. Template Installation
2.2.1 Cache
2.2.2 Upload Files
2.2.3 Re-Login
2.2.4 Set Package

and if i restore 2.2.4 default magento theme, always blank, i think it’s blank since 2.2.2 Upload Files

And in admin, if i click Import cms page or Import static blocks => blank page

So what can i do ? Thank you