Today an Account Performance Report that we've been running for a long time started failing with ReportDefinitionError.INVALID_FIELD_NAME_FOR_REPORT against API v201809.
It looks like maybe this is a bug in the API and this should still be allowed? Thanks for looking,
Joel
HTTP Response Code: 400, FieldPath: ConversionTypeName, Trigger: Cannot select a combination of ConversionTypeName and AbsoluteTopImpressionPercentage,ActiveViewCpm,ActiveViewCtr,ActiveViewImpressions,ActiveViewMeasurability,ActiveViewMeasurableCost,ActiveViewMeasurableImpressions,ActiveViewViewability,AllConversionRate,AverageCost,AverageCpc,AverageCpe,AverageCpm,AverageCpv,AveragePosition,Clicks,ContentBudgetLostImpressionShare,ContentImpressionShare,ContentRankLostImpressionShare,ConversionRate,Cost,CostPerAllConversion,CostPerConversion,Ctr,EngagementRate,Engagements,Impressions,InteractionRate,InteractionTypes,Interactions,InvalidClickRate,InvalidClicks,SearchBudgetLostImpressionShare,SearchExactMatchImpressionShare,SearchImpressionShare,SearchRankLostImpressionShare,TopImpressionPercentage,VideoViewRate,VideoViews, Type: ReportDefinitionError.INVALID_FIELD_NAME_FOR_REPORT