[Observium] Null data billing module API

Hi all,

I'm trying to port billing data out of observium via the simple API but I'm only getting null data as below:

{"login":{"success":{"code":"101","msg":"User authentification succeeded"}},"data":[{"timestamp":null,"traf_total": null,"traf_in":null,"traf_out":null},{"timestamp":null," traf_total":null,"traf_in":null,"traf_out":null},{" timestamp":null,"traf_total":null,"traf_in":null,"traf_out" :null},{"timestamp":null,"traf_total":null,"traf_in":null,"traf_out":null}

Any ideas on what could be causing this ?

Regards, Daniel