Playground/tutorials output is not displayed correctly. It says 'Not found'

[nidamunir]

Which package(s) are affected?

Lit Core (lit / lit-html / lit-element / reactive-element)

Description

Playground/tutorials output is not displayed correctly. It says 'Not found'. I even fixed the file path from .js to .ts but it is still not working

Reproduction

https://lit.dev/playground/#

Workaround

I tried switching languages and file src

Is this a regression?

No or unsure. This never worked, or I haven't tried before.

Affected versions

Latest

Browser/OS/Node environment

Safari Version 17.5 (19618.2.12.11.6)

[nidamunir]

Just tested in Chrome. It is working in chrome, but not on Safari

[augustjk]

Transferred to the lit.dev repo but I am unable to reproduce this even in Safari. It might've been temporary due to CDN, or something stale in the service worker.