[imp] Horde_Prefs_Scope::serialize() must return a string or NULL

[Jan Schneider]

Zitat von Kein Name <muelladdi at gmail.com>:

> Hello List,
>
> I am running the Horde Webmail Edition.
> From time to time I see this error, when certain users login:
>
> Jun 21 09:48:33 webmailh5 HORDE: [imp] Login success for user at example.com
> (192.168.1.1) to {imap://mail.example.com/} [pid 12661 on line 157 of
> "/var/www/webmail/imp/lib/Auth.php"]
> Jun 21 09:48:41 webmailh5 HORDE: [turba] Horde_Prefs_Scope::serialize()
> must return a string or NULL [pid 12627 on line 62 of
> "/usr/share/php/Horde/Prefs/Cache/HordeCache.php"]
> Jun 21 09:48:41 webmailh5 HORDE: [imp] Horde_Prefs_Scope::serialize() must
> return a string or NULL [pid 12627 on line 1679 of
> "/usr/share/php/Horde/Registry.php"]
>
> Jun 21 09:48:41 webmailh5 HORDE: [horde] Mail is not activated. [pid 12627
> on line 1532 of "/usr/share/php/Horde/Registry.php"]
>
> I looked into the horde_prefs table and the settings for this user, but
> could not find any special characters etc.
>
> I found this info:
> http://horde.690.n7.nabble.com/usr-bin-kronolith-agenda-
> Horde-Prefs-Scope-serialize-must-return-a-string-or-NULL-
> td134336.html#a134347
>
> However the Scope.php does not exist anymore in the most recent version.
>
> How can I debug this matter further?
>
> Thanks!
> Stefan

Do you have any custom preference hooks?

-- 
Jan Schneider
The Horde Project
https://www.horde.org/