Désolé.
Voici une partie du log d'Nginx :
2015/04/29 18:38:37 [error] 903#0: *92 FastCGI sent in stderr: "PHP message: PHP Warning: require_once(/usr/share/nginx/www/wp-content/themes/Zephyr/vendor/pixelentity-themes-updater/class-pixelentity-themes-updater.php): failed to open stream: No such file or directory in /usr/share/nginx/www/wp-content/themes/Zephyr/vendor/tf_updater/index.php on line 19
PHP message: PHP Fatal error: require_once(): Failed opening required '/usr/share/nginx/www/wp-content/themes/Zephyr/vendor/pixelentity-themes-updater/class-pixelentity-themes-updater.php' (include_path='.:/usr/share/php:/usr/share/pear') in /usr/share/nginx/www/wp-content/themes/Zephyr/vendor/tf_updater/index.php on line 19" while reading response header from upstream, client: 172.16.1.1, server: doclot.io, request: "GET /wp-admin/update-core.php HTTP/1.0", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "doclot.io", referrer: "
https://doclot.io/wp-admin/"