[Fixed in next Release] When adding a new post on a custom post type, the block editor doesn't load

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[jeffreyS-6]

I am trying to:

Add a new post in a custom post type created with toolset.

Link to a page where the issue can be seen:
It is the admin page when you click add new.

I expected to see:
The block editor.

Instead, I got:

The editor has encountered an unexpected error. I tried disabling all plugin and switching to the 2023 theme and it still had the same error.

I clicked the copy error and I get:

TypeError: Cannot read private member #e from an object whose class did not declare it
at get text (hidden link)
at get length (hidden link)
at WI.isEmpty (hidden link)
at save (hidden link)
at hidden link
at ba.<computed> (hidden link)
at hidden link
at hidden link
at Ur (hidden link)
at Fr (hidden link)

[Nigel]

Hi there

Although the symptoms appear slightly different, this looks like a variant of this known issue: https://toolset.com/errata/wordpress-6-5-update-breaks-editor-if-using-core-media-block-with-dynamic-sources/

We hope to be in a position to release a fix soon, and in the meantime the best workaround would be to downgrade WordPress to 6.4.4, as described in the linked page.

[jeffreyS-6]

Thank you! I reverted and that solved it.