Worker works fine in editors preview tab, but error 1016 in browser


#1

Error 1016: https://unltd.com.hk/
Try to fetch page: https://dev.web.aws.unltd.com.hk
‘aws.unltd.com.hk’ is a subdomain delegated to Route 53.
And the code of worker:

addEventListener('fetch', async event => {
  event.respondWith(fetch('https://dev.web.aws.unltd.com.hk'));
});

Any ideas?