Error loading resources from sub-folders.

I was using a lot the samples to build my own PWA app, I don't know what changed on my VSCode that I cannot run the sample code with Live Server. I get a weird problem with subfolders.

If I remove the first slash from de references it works:

Example: If I change "" into ""

I'll appreciate if someone can give me some help to solve this issue, it happen to me not just with this sample project but also with my own projects.