wmi not polling correctly

wmi poller does not get any info mation followed install as per website if I run a manual poll I get the following error.

WMI Poller:
 Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz
PHP Fatal error:  Uncaught ValueError: array_combine(): Argument #1 ($keys) and argument #2 ($values) must have the same number of elements in /opt/observium/includes/wmi.inc.php:140
Stack trace:
#0 /opt/observium/includes/wmi.inc.php(140): array_combine()
#1 /opt/observium/includes/wmi.inc.php(15): wmi_parse()
#2 /opt/observium/includes/polling/wmi.inc.php(235): wmi_get()
#3 /opt/observium/includes/polling/functions.inc.php(306): include('...')
#4 /opt/observium/poller.php(171): poll_device()
#5 {main}
  thrown in /opt/observium/includes/wmi.inc.php on line 140