[OS X Emacs] Symbol’s function definition is void: LaTeX-extract-key-value-label

[Roussanka Loukanova]

Dear All,

When I start Aquamacs and try
Aquamacs > File > Open Recent
and select a recent file from the drop-down menu, the file does't get
loaded, and
I get in the minibuffer:
Symbol’s function definition is void: LaTeX-extract-key-value-label

After some repetitions, in selecting the desired file, from the list I
may get it open, or sometimes, go through C-x C-f.

This started recently, maybe yesterday. Perhaps I hit some keys
unintentionally, which set up something.

Best Regards,
Roussanka