Docker Container Memory usage, % not graphing

Again assuming I have done this correctly… pasting the command into a shell yields the below:

ERROR: realpath(OSMC/app-docker-10-rtorrent.rrd): Permission denied

Which is strange, because the permissions look correct to me:

root@LibreNMS:~# ls -la /opt/librenms/rrd/OSMC/
total 59968
drwxrwxr-x+ 2 librenms librenms 12288 Jan 4 12:35 .
drwxrwxr-x+ 12 librenms librenms 4096 Dec 14 15:25 …
-rw-r–r-- 1 librenms librenms 849128 Jan 11 23:05 app-docker-10-rtorrent.rrd
-rw-r–r-- 1 librenms librenms 849128 Jan 11 23:05 app-docker-10-rtorrent_geoip.rrd
-rw-r–r-- 1 librenms librenms 849128 Jan 11 23:05 app-docker-10-rtorrent_logs.rrd
-rw-r–r-- 1 librenms librenms 171272 Jan 11 23:05 app-os-updates-12.rrd
-rw-r–r-- 1 librenms librenms 171272 Jan 11 23:05 availability-2592000.rrd
-rw-r–r-- 1 librenms librenms 171272 Jan 11 23:05 availability-31536000.rrd
-rw-r–r-- 1 librenms librenms 171272 Jan 11 23:05 availability-604800.rrd
-rw-r–r-- 1 librenms librenms 171272 Jan 11 23:05 availability-86400.rrd
-rw-r–r-- 1 librenms librenms 171272 Jan 11 23:05 hr_processes.rrd
-rw-r–r-- 1 librenms librenms 171272 Jan 11 23:05 hr_users.rrd

Output omitted for brevity, the other files inside the directory are all owned by the same user. So it seems to be a permissions issue somehow… not sure where to go from here.