Fetchevent Network Error Response

[mskian]

Just open URL first time I just check browser log without refresh that time I spotted the yellow warning message if refresh the page it's gone
sometimes this warning show even the page refresh

[JacobSNGoodwin]

Thanks for reporting. I'm not terribly familiar with workbox and PWAs, but if I can figure it out I'll let you know. If you find the fix, go ahead and submit it.