Facebook ads python sdk get_stats doesn't return "actions" field

I can't get AdCampaign's get_stats() method to return the "actions" field. Snippet:

stats = list(ad_campaign.get_stats(fields=[
    'impressions',
    'spent',
    'clicks',
    'actions',
]))
print stats[0]
>>> <AdStats> {"clicks": 0, "impressions": 0, "spent": 0}

I have also tried to get the report on AdAccount, AdSet and AdGroup levels, but none of them had the "actions" field.

I'm assuming I have misconfigured my campaign, so here's a basic rundown:

• 
  

  AdCampaign:

  
  
  
  
  • status: "PAUSED"
  
  
  • objective: "WEBSITE_CONVERSIONS"
  
  
  
  


• 
  

  AdCampaign has one AdSet:

  
  
  
  
  • bid_type: "ABSOLUTE_OCPM"
  
  
  • bid_info: {'ACTIONS': 1}
  
  
  • promoted_object: {'pixel_id': <valid pixel id string>}
  
  
  • start_time: one month in the future
  
  
  
  


• 
  

  AdSet has one AdGroup:

  
  
  
  
  • objective: "WEBSITE_CONVERSIONS"
  
  
  
  

I also queried the AdGroup object for conversion_specs, they are set and match defaults described in the doc.