Uncaught (in promise) TypeError: Request failed at <anonymous>

[pirovorster]

Getting the following error on load:

Uncaught (in promise) TypeError: Request failed
at

Current Behavior

Getting the following error on load.

I however see that it is attempting to load the files from the sw

However

1. Why is it loading it multiple times
2. When I change site.css to siteX.css. It also fails to load it via the service worker
   

Steps to Reproduce -

Code

var UpUp = require('upup').UpUp;
UpUp.start({
    'content-url': 'index.html',
    'assets': 
    [
     'style/site.css'
    , 'style/select.css'
    , 'https://code.getmdl.io/1.3.0/material.min.css']
  });

Your Environment

• Version used: v1
• Browser Name and version: Chrome
• Operating System and version (desktop or mobile): Desktop Version 63.0.3239.84
• Link to your project: None