From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Subject: Re: Cannot sync with caldav anymore
Date: Fri, 16 Feb 2018 14:07:34 +0100
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To: basilio@gmx.com
Cc: emacs-orgmode@gnu.org

Hello,

<basilio@gmx.com> writes:

> After updating to Org mode version 9.1.6 (9.1.6-48-gfe7619-elpa) I lost
> ability to sync with caldav (which I use for syncing my schedule with
> Nextcloud <-> Android). Before the update everything was perfect. And I
> beleive that everything is ok with org-caldav as there were no updates
> for it this time. I use emacs package system for updating and therefore
> I cannot downgrade the org-mode. And I heavily rely on it in my daily
> routines. So I'm stuck and need some advice.
>
> Debugger entered--Lisp error: (wrong-type-argument stringp ARCHIVE)
>   string-match("{.+?}" ARCHIVE)
>   org-tags-expand(ARCHIVE t)
>   #[257 "\300\301\"\207" [org-tags-expand t] 4 "\n\n(fn TAG)"](ARCHIVE)
>   mapcar(#[257 "\300\301\"\207" [org-tags-expand t] 4 "\n\n(fn TAG)"] (ARCHIVE))
>   cl-mapcar(#[257 "\300\301\"\207" [org-tags-expand t] 4 "\n\n(fn TAG)"] (ARCHIVE))
>   apply(cl-mapcar #[257 "\300\301\"\207" [org-tags-expand t] 4 "\n\n(fn TAG)"] (ARCHIVE) nil)
>   cl-mapcan(#[257 "\300\301\"\207" [org-tags-expand t] 4 "\n\n(fn TAG)"] (ARCHIVE))

This is difficult to tell because the backtrace is not complete, and it
is compiled. AFAICT, somewhere, you have a list of tags like '(ARCHIVE)
but it should be '("ARCHIVE").

If that doesn't ring a bell, please a complete, un-compiled backtrace
(i.e., using C-u M-x org-reload).

Regards,

-- 
Nicolas Goaziou