Yandex map and HH metro api?

Question

Yandex

Previously, there was a question Why is the page spinning to the Yandex map?
it turned out that if you remove part of the code

// Создадим панель маршрутизации.
                routePanelControl = new ymaps.control.RoutePanel({
                    options: {
                        // Добавим заголовок панели.
                        showHeader: true,
                        title: 'Расчёт стоимости эвакуации'
                    }
                });

the map is loaded without dots and panels, the page does not rotate - ok
if you remove it

let startingPrice= 2500;
        let routeLength =  null
        fetch('https://api.hh.ru/metro/1').then((resp)=>{
            return resp.json()
        }).then((data)=>{
            // data.lines.map((line)=>{
            //     line.stations.map((station)=>{
            //         _stations.push({
            //             name: station.name,
            //             lat: station.lat,
            //             lng: station.lng
            //         })
            //     })
            // })

the map won't load at all.
tell me, please, what are your ideas?)
when loading the page, it flips to the map, as if there was an anchor