Service worker error at jirafe.io

[superp]

I've got this error at jirafe.io site:

Uncaught (in promise) TypeError: Failed to execute 'fetch' on 'ServiceWorkerGlobalScope': 'only-if-cached' can be set only with 'same-origin' mode at self.addEventListener.event (sw.js:31)

It's happened when I load the page at second time. And page is blank :(