Méssage erreur sessions

Bonjour a tous et a toute j'ai un problème je voudrait savoir comment creé ton un dossier "sessions" (au pluriel) à la racine de votre site.
je suis chez free voici l'erreur qui me donne
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Warning: session_start(): open(/var/www/free.fr/9/2/blocscript/sessions/sess_c6e11f2646bd31cf2c91efc71267256e, O_RDWR) failed: No such file or directory (2) in /var/www/free.fr/9/2/blocscript/news/admin/index.php on line 1

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /var/www/free.fr/9/2/blocscript/news/admin/index.php:1) in /var/www/free.fr/9/2/blocscript/news/admin/index.php on line 1

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /var/www/free.fr/9/2/blocscript/news/admin/index.php:1) in /var/www/free.fr/9/2/blocscript/news/admin/index.php on line 1

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Warning: Unknown(): open(/var/www/free.fr/9/2/blocscript/sessions/sess_c6e11f2646bd31cf2c91efc71267256e, O_RDWR) failed: No such file or directory (2) in Unknown on line 0

Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/www/free.fr/9/2/blocscript/sessions) in Unknown on line 0
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Explique moi svp merci