How to fix Property 'includes' is missing in type error in angular 2?

Question

Angular

Hello!
The following error comes out when compiling:

And here is my code:
chain.module.ts created interfaces

export interface EfficiencyOfAdditionalCostV1 {
    ReportDate: Date;
    ExtraProfitHour: number;
}
export interface EfficiencyOfAdditionalCostV4 {
    ChangeBNPMonth: number;
    ChangePPDay: number;
}

export interface EfficiencyOfAdditionalCostRes {
    EfficiencyOfAdditionalCost_V1: EfficiencyOfAdditionalCostV1[],
    EfficiencyOfAdditionalCost_V2: EfficiencyOfAdditionalCostV4[],
}

Then I added them to chain.service.ts

getEfficiencyOfAdditionalCostRes(): Promise<EfficiencyOfAdditionalCostRes> {
        return this.http.get(this.api.API_URL + 'Production/EfficiencyOfAdditionalCost?counter=3')
            .toPromise()
            .then(res => res.json()[0]);
    }

Then, now I want to use in components:

export class WidgetEfficiencyOfValueChainComponent extends WidgetComponent implements OnInit {
    data: EfficiencyOfAdditionalCostV4[] = [];

constructor(private servise: ChainModule){
}
ngOnInit() {
        this.service.getEfficiencyOfAdditionalCostRes().then(res => {
           this.data = res;
        });
}
}

There is an error in this.data=res,
I can not fix the error. Look please.