No this is a server configuration issue in your php.ini file it looks like you session_save_path setting is set to a directory that doesn't exist. If you show this to your hosting company they should be able to get it resolved for you.
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.