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

Error 1016:
Try to fetch page:
‘’ is a subdomain delegated to Route 53.
And the code of worker:

addEventListener('fetch', async event => {

Any ideas?

Did you find a workaround for this?

I’m experiencing this right now.

Cloudflare don’t even let the request start – it returns a HTTP status code 530 and the html body says:

You’ve requested a page on a website ( that is on the Cloudflare network. Cloudflare is currently unable to resolve your requested domain (