Speaker notes window doesn't get reference to Reveal object when loading from filesystem

[denehyg]

When viewing a presentation from the filesystem the notes window doesn't get a reference to the Reveal object and throws the following error:

Uncaught ReferenceError: Reveal is not defined
    at getTimings (notes.html:484)
    at setupTimer (notes.html:541)
    at handleConnectMessage (notes.html:387)
    at notes.html:354

When loading from a server the error does not occur.

The reference is added here: https://github.com/hakimel/reveal.js/blob/7991693bde3ee680868dfbfa1291d96735571c22/plugin/notes/notes.js#L25 however it doesn't seem to propagate to the speaker notes window itself.

I'm using macos. I'm seeing the error on Chrome and Safari, but Firefox works OK.

[tailorvj]

This issue is still persistent in May 2023. Apparently there has been some change in Chrome that causes this to happen, but Reveal.js is practically useless without this fix