disabling ‘CKEditor 5 Full-screen Mode’ leads to javascript error

@jons

In the "Active toolabar" textarea find and delete "fullScreen", text (or with comma in front in case fullscreen was the last item in your toolbar). You should be able to save the text format and subsequent edit will have toolbars rendered correctly.
The old configuration doesn't work with new module as the new plugin has minimally different label for the toolbar item.
On the module side we'll think about implementing hook_uninstall which will check existing text formats and remove old item if necessary.

Hi @salmonek
Great - that worked.
BTW I think the section is called 'toolbar items' or similar when in its broken state ('Active toolbar' when its fixed)