I am having a problem using Org Cite with Org Publish (Emacs 28.1, Org 9.6.1). Publication of documents containing an Org Cite citation fails every time. Here's a minimum (not) working example. I have a file `publish.el` which contains the following vanilla Elisp.
```
(require 'package)
(setq package-user-dir (expand-file-name "./.packages"))
(setq package-archives
      '(("melpa" . "https://melpa.org/packages/"<https://melpa.org/packages/>)
        ("elpa" . "https://elpa.gnu.org/packages/"<https://elpa.gnu.org/packages/>)))

(package-initialize)
(unless package-archive-contents
  (package-refresh-contents))

(require 'ox-publish)

(setq org-publish-project-alist
      `(("website"
         :base-directory "Content/"
         :publishing-directory "Public/")))

(org-publish-all t)
```
The document I want to publish is `Content/index.org` and contains a citation.
```
#+bibliography: bibliography.bib

[cite/t:@edwards1992]

#+print_bibliography:
```
This refers to the bibliography file `Content/bibliography.bib`.
```
@book{edwards1992,
  title = {Likelihood},
  author = {Edwards, A. W. F.},
  date = {1992},
  edition = {Expanded edition},
  publisher = {{Johns Hopkins University Press}},
  location = {{Baltimore}},
}
```
When I try to publish this document, using the bash command `emacs -Q --script publish.el`, I get an error message and no output.
```
Resetting org-publish-cache
Publishing file /home/ag0082/Documents/Computing/Website/Mwe/Content/index.org using ‘org-html-publish-to-html’
Debugger entered--Lisp error: (error "Wrong value for ENTRY-OR-KEY: nil")
  signal(error ("Wrong value for ENTRY-OR-KEY: nil"))
  error("Wrong value for ENTRY-OR-KEY: %S" nil)
  ...
  command-line-1(("-scriptload" "publish.el"))
  command-line()
  normal-top-level()
```
Strangely, I find I that I can export the file `Content/index.org ` (C-c C-e h o) with no problem.

Does anyone know what is going wrong?

Regards

Amery

Dr Amery Gration
Research Fellow in Astrophysics
Astrophysics Research Group
University of Surrey
GUILDFORD
GU2 7XH