Graphs show -nan

I just installed LibreNMS on a Ubuntu Server. Only none of the graphs will show any data. They all shows nan.
permissions for the RRD folder and poller rights seems to be good as far as I can see.

Output ./poller.php -h all - librenms poller - Pastebin.com

sven@ubuntu:/opt/librenms$ ls -la /opt/librenms/rrd/
total 16
drwxrwxr-x  4 librenms librenms 4096 Jan 18 19:38 .
drwxr-xr-x 19 librenms librenms 4096 Jan 18 20:33 ..
drwxr-xr-x  2 librenms librenms 4096 Jan 18 19:38 192.168.0.1
drwxr-xr-x  2 librenms librenms 4096 Jan 18 19:38 192.168.0.57

Can someone point me in the right direction?

Thanks!

Run ./validate.php

Output ./validate.php.

      sven@ubuntu:/opt/librenms$ ./validate.php 
        ==========================================================
        Component | Version
        --------- | -------
        LibreNMS  | 292c4382c1f020412aaf1e0ad7a1af80d21e3e50
        DB Schema | 155
        PHP       | 7.0.13-0ubuntu0.16.04.1
        MySQL     | 10.0.28-MariaDB-0ubuntu0.16.04.1
        RRDTool   | 1.5.5
        SNMP      | NET-SNMP 5.7.3
        ==========================================================

        [FAIL]  You need to run this script as root or librenms
        [WARN]  Your install is out of date, last update: Tue, 17 Jan 2017 17:42:48 +0000
        [OK]    Database connection successful
        [FAIL]  The poller has not run in the last 5 minutes, check the cron job

Looks like you’ve not followed the install instructions, please revisit them and follow them exactly.