Blocker: Isolated Block Editor dependency is broken in WP 6.6 and up.

[imath]

The library hasn't been updated for a while, latest version (2.29) was released on March, 21, 2024.

An issue is already available here since July 16: Automattic/isolated-block-editor#260

I was wondering how WordPress.org plugin's support was doing to deal with it, I've found it's using the version 17.9 of the Gutenberg plugin.

So if you absolutely need to test it, here's Gutenberg 17.9 download link.