SMART agent issue with empty graphs

[kyob]

validate.php output => https://p.libren.ms/view/raw/046de41b

issue

I followed steps in smart agent but I have icons instead graphs.

screenshots

smart agent host

• /etc/snmp/smart output =>

sda,null,null,3391 (Average 10466),null,null,null,null,null,null,30,4,null,null,null,null,null,0,0,0,0,0,0,0,0,12931
nvme0,null,null,null,null,null,null,null,null,null,31,null,null,null,null,null,null,0,0,0,0,0,0,0,0,12461

• /etc/snmp/smart -g output =>

useSN=0
smartctl=/usr/sbin/smartctl
cache=/var/cache/smart
sda /dev/sda -d sat
nvme0 /dev/nvme0 -d nvme

• cat /etc/snmp/smart.config output =>

useSN=0
smartctl=/usr/sbin/smartctl
cache=/var/cache/smart
sda /dev/sda -d sat
nvme0 /dev/nvme0 -d nvme

• cat /etc/cron.d/smart-for-librenms output =>

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
*/3 * * * * root /etc/snmp/smart -u

• cat /var/cache/smart output =>

sda,null,null,3391 (Average 10466),null,null,null,null,null,null,30,4,null,null,null,null,null,0,0,0,0,0,0,0,0,12931
nvme0,null,null,null,null,null,null,null,null,null,32,null,null,null,null,null,null,0,0,0,0,0,0,0,0,12461

• tail -n 2 /etc/snmp/snmpd.conf output =>

extend smart /etc/snmp/smart

librenms host

• ./poller.php -h 192.168.12.186 -d -m applications output from smart agent host => https://p.libren.ms/view/raw/f384bcd5

question

How to fix or what I did wrong?