[horde] ActiveSync Error Message in log

[Horst Simon]

Get Following messages in the log file. Is this anything to worry  about,
so can not see any problems?

Horst

HORDE 2026-10-21T13:17:37+11:00 emergency: TypeError: Cannot access offset
of type array in isset or empty in
/var/www/horde/vendor/horde/util/src/HordeString.php:327
Stack trace:
#0
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Imap/EasMessageBuilder.php(332):
Horde\Util\HordeString::upper()
#1
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Imap/EasMessageBuilder.php(409):
Horde_ActiveSync_Imap_EasMessageBuilder->_meetingRequest()
#2
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Imap/EasMessageBuilder.php(159):
Horde_ActiveSync_Imap_EasMessageBuilder->_specialTypes()
#3
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Imap/EasMessageBuilder.php(109):
Horde_ActiveSync_Imap_EasMessageBuilder->_populateObject()
#4
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Imap/Adapter.php(1109):
Horde_ActiveSync_Imap_EasMessageBuilder->getMessageObject()
#5
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Imap/Adapter.php(452):
Horde_ActiveSync_Imap_Adapter->_buildMailMessage()
#6
/var/www/horde/vendor/horde/core/lib/Horde/Core/ActiveSync/Driver.php(2001):
Horde_ActiveSync_Imap_Adapter->getMessages()
#7
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Connector/Exporter/Sync.php(745):
Horde_Core_ActiveSync_Driver->getMessagesBulk()
#8
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Connector/Exporter/Sync.php(695):
Horde_ActiveSync_Connector_Exporter_Sync->_prefetchMessages()
#9
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Connector/Exporter/Sync.php(580):
Horde_ActiveSync_Connector_Exporter_Sync->_getChangeMessage()
#10
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Connector/Exporter/Sync.php(100):
Horde_ActiveSync_Connector_Exporter_Sync->_sendNextChange()
#11
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Request/Sync.php(676):
Horde_ActiveSync_Connector_Exporter_Sync->sendNextChange()
#12
/var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync/Request/Base.php(271):
Horde_ActiveSync_Request_Sync->_handle()
#13 /var/www/horde/vendor/horde/activesync/lib/Horde/ActiveSync.php(895):
Horde_ActiveSync_Request_Base->handle()
#14 /var/www/horde/vendor/horde/rpc/lib/Horde/Rpc/ActiveSync.php(183):
Horde_ActiveSync->handleRequest()
#15 /var/www/horde/vendor/horde/horde/rpc.php(202):
Horde_Rpc_ActiveSync->getResponse()
#16 /var/www/horde/web/horde/rpc.php(3): require_once('...')
#17 {main} [pid 681018 on line 510 of
"/var/www/horde/vendor/horde/imp/lib/Application.php"]