Pnp4nagios does NOT show Datasource dropdown list

Our new Thruk server doesn’t show the “Datasource dropdown list” for pnp4nagios charts.
(This is the small dropdown list in the upper right corner of graph, where I can choose which unit would I like to see from Performance data, e.g Count, Percentage, etc.)
This new server is getting data from logcache.

Old server (where pnpdata is located locally) shows it…

Today I have checked it again, and this time with different browsers also!
It looks:

  • it is working WELL with INTERNET EXPLORER
  • and it is NOT OK with EDGE and FIREFOX
    Could it be some browser settings?!

It looks there are problem with cross-origin resource sharing!

I have enabled to access server A (mono) from Server B (moni) in apache config:
Header set Access-Control-Allow-Origin:
Header set Access-Control-Allow-Credentials: true
Header set Access-Control-Allow-Headers: “X-Requested-With”