[O] Tab-completion no longer works?

[Martin Steffen]

Hi, Since recently ---I can't remember exactly since when--- some
completion-feature I liked does not work any more.

By completion, I mean the expansion of 

   <Q TAB

to 

+BEGIN_QUOTE
  blabla
#+END_QUOTE

or similar for including SRC or LATEX etc.

This expansion no longer works. I tried to ``narrow down'' under which
circumstances it breaks..

Now it turns out, that already the very first lines break it. Following
the manual I start the org-section in my .emacs as

-----------------------------------------------------------------------------
(setq load-path (cons "~/gnu/emacs/24/lisp/org-mode/lisp" load-path)) ;;; 
destroys tab completion????
(setq load-path (cons "~/gnu/emacs/24/lisp/org-mode/contrib/lisp" load-path))
---------------------------------------------------

If I comment-out the first line, the completion still works, if I
include the line and extend the path properly, the completion does not
work (of course, other problems arise then)




Any suggestions?

Martin


------------------------- Versions
Emacs version: GNU Emacs 24.3.1 
Org mode version 9.1.4 
---------------------------------

I have though the same problem for


------------------------- Versions
Emacs version: GNU Emacs 25.3.1 
Org mode version 9.1.3
---------------------------------