tengo este error no se que seraUncaught (in promise) TypeError: Failed to execute ‘Cache’ on ‘addAll’: Request failed dejo mi codigo <cod...

tengo este error no se que seraUncaught (in promise) TypeError: Failed to execute ‘Cache’ on ‘addAll’: Request failed

dejo mi codigo

const VERSION = "v1"

self.addEventListener("install", event => {
	event.waitUntil(precache())
})

self.addEventListener("fetch", event => {
	const request = event.request
	// get
	if (request.method === "GET") {
		return
	}

	// buscar en cache
	event.respondWith(cachedResponse())
})

async function precache() {
	const cache = await caches.open(VERSION)
	return cache.addAll([
		'/',
		'/index.html',
		'/assets/index.js',
		'/assets/MediaPlayer.js',
		'/assets/plugins/AutoPlay.js',
		'/assets/plugins/AutoPause.js',
		'/assets/index.css',
		'/assets/BigBuckBunny.mp4',
	])
}

async function cachedResponse(request) {
	const cache = await caches.open(VERSION)
	const response = await cache.match(request)
	return response || fetch(request)
}