When loading the following file, I get: 'File mode specification error: (error Invalid base64 data)'
--- BEGIN SAMPLE FILE --- #+STARTUP: inlineimages #+begin_src org [[attachment:thisfiledoesnotexist.jpg]] #+end_src --- END SAMPLE FILE --- It also happens with 'begin_example'. Org mode version 9.6.1 on Emacs 28.2.
