The example code is not working in Chrome or Edge, windows 10

[mariabardon]

Hi, I have copy and pasted your code into a local html file, and only one of the layers is displayed in the page. I am using Chrome, in Windows 10. I have also tried Microsoft Edge, even though you say it would not work, anyway... Any suggestions?

[sefo]

Did you find a solution to this? I have the exact same problem.
I've been trying to make this library work for hours...

EDIT: The link to the tiles layer returns 404. Replace with 'https://{s}.tile.opentopomap.org/{z}/{x}/{y}.png' for example.