[horde] portal white page

Mon Feb 2 11:15:59 UTC 2026

Hi,

please, can anyone bring me on the right path?

Portal Page white page.
No errors in the logs.
Did some checks I crawled from the internet, but no success.
Anything else working fine. Its Horde 6.0.0beta1
Its a composer installation and up to date.
Dependencies seem all to be installed.

How would I proceed?

Many thanks,
Andreas

Zitat von Andreas Mauser <andreas at mauser.info>:

> Am 16. Januar 2026 um 19:56 schrieb "Andreas Mauser"  
> <andreas at mauser.info  
> mailto:andreas at mauser.info?to=%22Andreas%20Mauser%22%20%3Candreas%40mauser.info%3E  
> >:
>
>
>>
>> -- sendinig again as of dmarc problems --
>>
>> Hello,
>>
>> anyone who can guide me where to search for the "portal white page"  
>> I experience?
>>
>> It doesnt matter if I set portal blocks or not, it just doesnt come up.
>>
>> Horde is installed with composer and updated 2 days ago to latest  
>> version. It didnt work before either.
>
>
> I get this in the log, when click on portal ,after enabled debug:
>
> 2026-01-17T18:54:07.154511+01:00 wm HORDE: [kronolith] Horde_Prefs:  
> Storing preference value (display_external_cals) [pid 143558 on line  
> 538 of  
> "/var/www/html/wm/vendor/horde/kronolith/lib/CalendarsManager.php"]
> 2026-01-17T18:54:07.165115+01:00 wm HORDE: [kronolith] Horde_Prefs:  
> Storing preference value (display_remote_cals) [pid 143558 on line  
> 621 of  
> "/var/www/html/wm/vendor/horde/kronolith/lib/CalendarsManager.php"]
> 2026-01-17T18:54:07.165389+01:00 wm HORDE: [kronolith] Horde_Prefs:  
> Storing preference value (holiday_drivers) [pid 143558 on line 580  
> of "/var/www/html/wm/vendor/horde/kronolith/lib/CalendarsManager.php"]
> 2026-01-17T18:54:07.167047+01:00 wm HORDE: [kronolith] PHP ERROR:  
> substr(): Passing null to parameter #1 ($string) of type string is  
> deprecated [pid 143558 on line 276 of  
> "/var/www/html/wm/vendor/horde/util/lib/Horde/String.php"]
> 2026-01-17T18:54:07.167206+01:00 wm HORDE:  1.  
> Horde_Core_Block_Layout_View->toHtml()  
> /var/www/html/wm/vendor/horde/horde/services/portal/index.php:36
> 2026-01-17T18:54:07.167376+01:00 wm HORDE:  2.  
> Horde_Core_Block->getTitle()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Core/Block/Layout/View.php:100
> 2026-01-17T18:54:07.167486+01:00 wm HORDE:  3.  
> Horde_Core_Block->_call()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Core/Block.php:152
> 2026-01-17T18:54:07.167603+01:00 wm HORDE:  4.  
> Kronolith_Block_Month->_title()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Core/Block.php:279
> 2026-01-17T18:54:07.167726+01:00 wm HORDE:  5.  
> Horde_Registry->getInitialPage()  
> /var/www/html/wm/vendor/horde/kronolith/lib/Block/Month.php:42
> 2026-01-17T18:54:07.167930+01:00 wm HORDE:  6.  
> Horde_Registry->callAppMethod()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Registry.php:2101
> 2026-01-17T18:54:07.168056+01:00 wm HORDE:  7.  
> Horde_Registry->getApiInstance()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Registry.php:1201
> 2026-01-17T18:54:07.168097+01:00 wm HORDE:  8.  
> Horde_String::ucfirst()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Registry.php:856
> 2026-01-17T18:54:07.168198+01:00 wm HORDE:  9. substr()  
> /var/www/html/wm/vendor/horde/util/lib/Horde/String.php:276
> 2026-01-17T18:54:07.168243+01:00 wm HORDE: 10.  
> Horde_ErrorHandler::errorHandler()
> 2026-01-17T18:54:07.168298+01:00 wm HORDE:
> 2026-01-17T18:54:07.168396+01:00 wm HORDE: [kronolith] PHP ERROR:  
> substr(): Passing null to parameter #1 ($string) of type string is  
> deprecated [pid 143558 on line 276 of  
> "/var/www/html/wm/vendor/horde/util/lib/Horde/String.php"]
> 2026-01-17T18:54:07.168724+01:00 wm HORDE:  1.  
> Horde_Core_Block_Layout_View->toHtml()  
> /var/www/html/wm/vendor/horde/horde/services/portal/index.php:36
> 2026-01-17T18:54:07.168835+01:00 wm HORDE:  2.  
> Horde_Core_Block->getTitle()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Core/Block/Layout/View.php:100
> 2026-01-17T18:54:07.168944+01:00 wm HORDE:  3.  
> Horde_Core_Block->_call()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Core/Block.php:152
> 2026-01-17T18:54:07.169130+01:00 wm HORDE:  4.  
> Kronolith_Block_Month->_title()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Core/Block.php:279
> 2026-01-17T18:54:07.169317+01:00 wm HORDE:  5.  
> Horde_Registry->getInitialPage()  
> /var/www/html/wm/vendor/horde/kronolith/lib/Block/Month.php:42
> 2026-01-17T18:54:07.169522+01:00 wm HORDE:  6.  
> Horde_Registry->callAppMethod()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Registry.php:2101
> 2026-01-17T18:54:07.169686+01:00 wm HORDE:  7.  
> Horde_Registry->getApiInstance()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Registry.php:1201
> 2026-01-17T18:54:07.169827+01:00 wm HORDE:  8.  
> Horde_String::ucfirst()  
> /var/www/html/wm/vendor/horde/core/lib/Horde/Registry.php:856
> 2026-01-17T18:54:07.169950+01:00 wm HORDE:  9. substr()  
> /var/www/html/wm/vendor/horde/util/lib/Horde/String.php:276
> 2026-01-17T18:54:07.170072+01:00 wm HORDE: 10.  
> Horde_ErrorHandler::errorHandler()
> 2026-01-17T18:54:07.170217+01:00 wm HORDE:
> 2026-01-17T18:54:07.170353+01:00 wm HORDE: [kronolith] Max memory  
> usage: 2097152 bytes [pid 143558 on line 619 of  
> "/var/www/html/wm/vendor/horde/core/lib/Horde/Registry.php"]
>
>
>
>> Many thanks,
>> Andreas
>>
>> --
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>>
>
> Mit freundlichen Grüßen,
> Andreas Mauser
> +49 160 551 1166
> Frankfurt am Main
>
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