How to inform which file or resource fail to fetch in Service Worker addAll

Question

I need to know how to send to the client which request is failing to be fetched in:

self.addEventListener('install', async ()=>{
    event.waitUntil(caches.open(CACHE_NAME).then((cache)=>
        cache.addAll(urlsToCache)
    ));
});

I need to receive It in the client. Something like:

//client.js

var reg=Navigator.serviceWorker.register('sw.js');
Navigator.serviceWorker.onerror=(ev)=>{
    document.getElementById('err1').textContent = ev.data.message;
}

// sw.js
self.addEventListener('install', async (ev)=>{
    event.waitUntil(caches.open(CACHE_NAME).then((cache)=>
        cache.addAll(urlsToCache)
    ).catch((err)=>{
        var client = clients.get(ev.clientId);     // ev does not have clientId
        client.postMessage(err.offendingRequest);  // offendingRequest does not exist
    }));
});