I would suggest that you go back and read the page carefully and recheck the example pics of any code used on this example.
As the code on this page screenshot looks different to what is in the text file below you have copied from.
The copy and paste text doesn’t match up:
export function page1_viewportEnter(event, $w) {
getTopCoins().then(response => {
$w('#coinList').text = "Name: " + response[0].name + "t t"
+ "Symbol: " + response[0].symbol + "t t"
//and so on with the code.....