[kronolith] cannot add events sent from Outlook

[Per olof Ljungmark]

OS: FreeBSD 10-STABLE
PHP 5.4.40
horde-5.2.5
kronolith 4.2.6

We ran an update from PHP 5.4.36 to .40 + all the available modules from
Horde in the FreeBSD ports tree.

Since then, we are unable to add events sent from Outlook in and read in
IMP:

The log says:

May  5 19:18:50 <local3.warn> webmail HORDE: [kronolith] PHP ERROR:
Argument 1 passed to Kronolith_Icalendar_Handler_Base::__construct()
must be an instance of Horde_Icalendar, null given, called in
/usr/local/www/horde/kronolith/lib/Api.php on line 746 and defined [pid
43025 on line 50 of
"/usr/local/www/horde/kronolith/lib/Icalendar/Handler/Base.php"]
May  5 19:18:50 <local3.emerg> webmail HORDE: [kronolith] Call to a
member function getComponents() on a non-object [pid 43025 on line 76 of
"/usr/local/www/horde/kronolith/lib/Icalendar/Handler/Base.php"]

Ideas anyone?

Thanks,