contact your host, they need to fix the session.save_path in the php.ini file.
the error is saying that the session.save_path either does not exist or cannot be accessed to start the session.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.