org-capture exists with "Capture abort: (wrong type argument...)"

[Simao <smm@imap.cc>]

I am trying to run `org-capture` to capture a journal entry but
`org-capture` always aborts with the following trace:

Debugger entered--Lisp error: (error "Capture abort:
(wrong-type-argument stringp nil)")
  signal(error ("Capture abort: (wrong-type-argument stringp nil)"))
  error("Capture abort: %s" (wrong-type-argument stringp nil))
  org-capture(nil)
  funcall-interactively(org-capture nil)
  call-interactively(org-capture nil nil)
  command-execute(org-capture)

Is there a problem with my settings? I am using the template suggested
in the manual.

Thanks,
Simao


Emacs  : GNU Emacs 25.1.1 (x86_64-unknown-linux-gnu, GTK+ Version
3.22.5)
 of 2016-12-23
Package: Org-mode version 8.2.10 (release_8.2.10 @
/usr/share/emacs/25.1/lisp/org/)

current state:
==============
(setq
 org-tab-first-hook '(org-hide-block-toggle-maybe
 org-src-native-tab-command-maybe
                      org-babel-hide-result-toggle-maybe
                      org-babel-header-arg-expand)
 org-speed-command-hook '(org-speed-command-default-hook
 org-babel-speed-command-hook)
 org-occur-hook '(org-first-headline-recenter)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-confirm-shell-link-function 'yes-or-no-p
 org-capture-templates '(("j" "Journal" entry (file+datetree
 "~/Sync/journal.org.txt")
                          "* %?\nEntered on %U\n  %i\n  %a")
                         )
 org-startup-indented t
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-from-is-user-regexp nil
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
 org-src-mode-configure-edit-buffer)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-mode-hook '(er/add-org-mode-expansions
                 #[nil "\300\301\302\303\304$\207"
                   [org-add-hook change-major-mode-hook
                   org-show-block-all append local] 5]
                 #[nil "\300\301\302\303\304$\207"
                   [org-add-hook change-major-mode-hook
                   org-babel-show-result-all append
                    local]
                   5]
                 org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point
 org-babel-execute-safely-maybe)
 org-cycle-hook '(org-cycle-hide-archived-subtrees
 org-cycle-hide-drawers
                  org-cycle-hide-inline-tasks org-cycle-show-empty-lines
                  org-optimize-window-after-visibility-change)
 org-todo-keywords '((sequence "TODO" "DOING" "|" "DONE"))
 org-confirm-elisp-link-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-log-into-drawer t
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 )