This is due to the lack of a php.ini with a session save dir. this has been fixed in version 0.2.1 and instructions on the wiki under the 'preparing your server' for embedded devices now include instructions for solving this issue for the most recent version.
This is due to the lack of a php.ini with a session save dir. this has been fixed in version 0.2.1 and instructions on the wiki under the 'preparing your server' for embedded devices now include instructions for solving this issue for the most recent version.