问检索JSON api数据时出错:未捕获(在promise中) SyntaxError:意外的token <在JSON的位置0

EN

Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0

window.addEventListener('load', () => {
    const locatoin = document.querySelector('#location');
    const tempNum = document.querySelector('#temp');
    const description = document.querySelector('#description');
    const APIkey = 'myAPIkeyHere';
    var lat;
    var long;
    var currentPos;
    
    if (navigator.geolocation) {
        currentPos = navigator.geolocation.getCurrentPosition(position => {
            lat = position.coords.latitude;
            long = position.coords.longitude;
        });

        const api = `api.openweathermap.org/data/2.5/weather?lat=${lat}&lon=${long}&appid=${APIkey}`;
        fetch(api)
            .then(response => {
                return response.json();
            })
            .then(data => {
                console.log(data);
            })
        }
})

function refresh() {
    location.reload();
}