For some reason, evaluating code blocks stopped working for me.
Example from the manual:
#+BEGIN_SRC emacs-lisp (defun org-xor (a b) "Exclusive or." (if a (not b) b)) #+END_SRC
Wrong type argument: integer-or-marker-p, "(ref:%s)". The same happens also for other languages.
Does somebody know what is going on?
I have Org mode version 9.0.1. I believe the problems started when I upgraded (but can't be sure).