why only koreader can't be luanch in kual

hi
my kindle oasis had be jb when the verison is 5.8.7
i update kindle to 5.9.5,yes,5.9.5 yesterday
i reset it ,and i install kual again,others extenison canben launch except koreader, i install kterm,and try to use "./koreader.sh" to launch koreader,but it display
/dev/console can'be created,premission denied
iptables can't be initialize ,you must be root
i like to understand why i can launch kual,but can't lanuch koreader(how to get root premission?)