Using the MWE example.org below, M-x org-babel-tangle returns:
helm-M-x: Symbol’s function definition is void: mu4e-message-at-point
$ cat /home/example.org
#+begin_src sh :tangle example.sh
ls
#+end_src
Tangling works when mu4e is removed from the .spacemacs layers:
dotspacemacs-configuration-layers '( mu4e)
Remark: M-x org-store-link returns the exact same error
