Other ways to say failed to load %e2%80%98%251%24s%e2%80%99. a serviceworker passed an opaque response to fetchevent.respondwith%28%29 while handling a %e2%80%98%252%24s%e2%80%99 fetchevent. opaque response objects are only valid when the requestmode is %e2%80%98no-cors%e2%80%99.