[horde] Unable to configure users and unable to share folders in IMP

[Jens Grüntjes]

Hello list,

I'm using the latest stable version of Horde Groupware 5.0.1.

Every time I try to configure my users (Menu Administration -> Users)  
I encounter the following error on my screen:
"Horde_Imap_Client requires a username and password."

This goes into the log-file:
2012-11-13T09:15:18+01:00 EMERG: HORDE [horde] Horde_Imap_Client  
requires a user name and password. [pid 23034 on line 416 of  
"/var/www/horde/imp/lib/Application.php"]
2012-11-13T09:15:18+01:00 DEBUG: HORDE  1.  
Horde_Core_Auth_Application->listUsers()  
/var/www/horde/admin/user.php:269
  2. Horde_Core_Auth_Application->listUsers()  
/usr/share/php/Horde/Core/Auth/Application.php:315
  3. Horde_Registry->callAppMethod()  
/usr/share/php/Horde/Core/Auth/Application.php:319
  4. call_user_func_array() /usr/share/php/Horde/Registry.php:1139
  5. IMP_Application->authUserList()
  6. Horde_Core_Auth_Application->listUsers() /var/www/horde/admin/user.php:269
  7. Horde_Core_Auth_Application->listUsers()  
/usr/share/php/Horde/Core/Auth/Application.php:315
  8. Horde_Registry->callAppMethod()  
/usr/share/php/Horde/Core/Auth/Application.php:319
  9. call_user_func_array() /usr/share/php/Horde/Registry.php:1139
10. IMP_Application->authUserList()
11. Horde_Auth_Imap->listUsers() /var/www/horde/imp/lib/Application.php:414
12. Horde_Auth_Imap->_getOb() /usr/share/php/Horde/Auth/Imap.php:134
13. Horde_Core_Auth_Application->listUsers() /var/www/horde/admin/user.php:269
14. Horde_Core_Auth_Application->listUsers()  
/usr/share/php/Horde/Core/Auth/Application.php:315
15. Horde_Registry->callAppMethod()  
/usr/share/php/Horde/Core/Auth/Application.php:319
16. call_user_func_array() /usr/share/php/Horde/Registry.php:1139
17. IMP_Application->authUserList()
18. Horde_Auth_Imap->listUsers() /var/www/horde/imp/lib/Application.php:414
19. Horde_Auth_Imap->_getOb() /usr/share/php/Horde/Auth/Imap.php:134
20. Horde_Imap_Client_Socket->__construct()  
/usr/share/php/Horde/Auth/Imap.php:169
21. Horde_Imap_Client_Base->__construct()  
/usr/share/php/Horde/Imap/Client/Socket.php:162

Authentication is done by IMP, here is the relevant snippet from  
horde's conf.php:

$conf['auth']['admins'] = array('user1', 'user2');
$conf['auth']['checkip'] = true;
$conf['auth']['checkbrowser'] = true;
$conf['auth']['resetpassword'] = true;
$conf['auth']['alternate_login'] = false;
$conf['auth']['redirect_on_logout'] = false;
$conf['auth']['list_users'] = 'list';
$conf['auth']['params']['app'] = 'imp';
$conf['auth']['driver'] = 'application';
$conf['auth']['params']['count_bad_logins'] = true;
$conf['auth']['params']['login_block'] = false;
$conf['auth']['params']['login_block_count'] = 5;
$conf['auth']['params']['login_block_time'] = 5;
$conf['mailer']['params']['auth'] = false;
$conf['menu']['links']['prefs'] = 'authenticated';
$conf['menu']['links']['logout'] = 'authenticated';

The same error message comes up when I try to share a folder in IMP  
(Menu User-preferences -> Webmail -> Shared folders) on-screen whereas  
in the log file I can only find this:

2012-11-13T10:21:45+00:00 DEBUG: HORDE [imp] Horde_Imap_Client  
requires a username and password. [pid 23034 on line 27 of  
"/usr/share/php/Horde/Core/Notification/Handler/Decorator/Hordelog.php"]

I googled around and found bug 10183 but that doesn't apply to me.

Sharing folders worked for me in Horde 4 so I think I made a mistake  
in my configuration. Strange to me is the fact that everything else  
works for me and my users.

Let me know if I have to provide you with more information. Thanks for  
your help.
-- 
Viele Grüße
Jens