...

• Check that omkd_url_base is set in the poller. 
• opcharts_url_base and opcharts_hostname can be blank, but the key needs to be defined. 
• Check the registry for opCharts in 

  http://host/en/omk/opHA/api/v1/registry

• Check that the pull is working for that server. 

Upgrade to version 3.2.0 and later.

...

Starting from version 3.2.0,  we have made significant changes on our internal shared code for all our applications to work on Opmantek's latest and fastest platform, however, previously installed product are not compatible with this version. 

To find out more about this upgrade please read: 

• Upgrading Opmantek Applications
• Product Compatibility