I think the correct way to solve this would be to set the session_save_path in the php.ini file, see also this post: Panel install gives session problem (setting it in the toolkit seems to work but is a hack)
I think the correct way to solve this would be to set the session_save_path in the php.ini file, see also this post: Panel install gives session problem (setting it in the toolkit seems to work but is a hack)