Hello, I am currently on the following org-mode version Org mode version 9.1.2 (9.1.2-22-ga2a034-elpa @ /home/giammi/.emacs.d/elpa/org-20171023/) GNU Emacs 25.1.1 (x86_64-pc-linux-gnu, GTK+ Version 3.22.11) of 2017- 09-15, modified by Debian If I create a simple heading like * Hello Test and then try to export as latex/pdf from org-mode (C-c C-e l o) I get the following error. Debugger entered--Lisp error: (void-variable element-property)   org-element--parse-elements(1 16 first-section nil nil nil (org-data nil))   org-element-parse-buffer(nil nil)   org-export-as(latex nil nil nil (:output-file "test_latex.tex"))   org-export-to-file(latex "test_latex.tex" nil nil nil nil nil #[257 "\300!\207" [org-latex-compile] 3 "\n\n(fn FILE)"])   org-latex-export-to-pdf(nil nil nil nil)   (org-open-file (org-latex-export-to-pdf nil s v b))   (if a (org-latex-export-to-pdf t s v b) (org-open-file (org-latex- export-to-pdf nil s v b)))   (lambda (a s v b) (if a (org-latex-export-to-pdf t s v b) (org-open- file (org-latex-export-to-pdf nil s v b))))(nil nil nil nil)   org-export-dispatch(nil)   funcall-interactively(org-export-dispatch nil)   call-interactively(org-export-dispatch nil nil)   command-execute(org-export-dispatch) I am looking for any hints on how to solve this problem. Thanks