PHP Fatal error: Class 'Sabre\VObject\Property\Text' not found

[hede]

Am Sat, 25 Jun 2016 12:38:42 +0200 schrieb hede <kolab983 at der-he.de>:

> PHP Fatal error:  Class 'Sabre\VObject\Property\Text' not found in /usr/share/roundcubemail/plugins/libcalendaring/libvcalendar.php on line 1386

Btw: Autoloading is the problem here. I'm not familar with php autoloading, but if I add the following lines to libvcalendar.php it works: 

###
spl_autoload_register(function ($class) {
    if (strpos($class, 'Sabre\\')===0) {
        $file = '/usr/share/php/'.str_replace('\\', '/', $class).'.php';
        @include $file;
    }
});
###
(with my php-sabre-vobject_3.4.5-1_all.deb installed)

Obviously with Red Hat this is not needed. What's the difference there?

Or is Winterfell also broken for Red Hat!?

regards
hede