Type-error in edit-post | WordPress.org

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I uploaded my local site to a ‘live’ dev site. I made no content changes – and certainly no code changes. The live site looks as I expected. But when I went in to edit any post or page (not just the /africa one), the editor immediately throws the following TypeError exception, and I can’t edit at all.

That is bad enough. But the same error appears on Create Post, disabling new posts – and of course completely eliminating the usefulness of a blog site.

I do not see this error in my local environment. Can anyone help with advice on what this issue is?

This is WP 6.1.1 using Twenty-Twenty-Three. Only difference I know about is the default db used on the dev host is MariaDB, and my local used MySQL.

Oh, and I am quite new to WordPress!

TypeError: (0 , E.__experimentalUseSlotFills) is not a function
    at Un.Slot )
    at wt )
    at $s )
    at wl )
    at bl )
    at yl )
    at il )
    at fl )
    at zn )
    at El )

The page I need help with: [log in to see the link]

 

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