You could search the forum for session.save_path = '/tmp
I'm not an expert but I think you should check if the .htaccess file is still present in your Moodle directory and if it points to a writeable directory where Moodle can save it sessions.
You could search the forum for session.save_path = '/tmp
I'm not an expert but I think you should check if the .htaccess file is still present in your Moodle directory and if it points to a writeable directory where Moodle can save it sessions.