[Users] vCalendar crashes on specific WebCal when loading

[claws-mail.20.gnufiz at spamgourmet.com]

Hi all,

when trying to includes this URL: 
http://ekvv.uni-bielefeld.de/ws/calendar?raumId=21357
as webCal in vCalendar, claws-mail crashes after one can see (quite
short) that some dates have been loaded.

Is there anything one can do about this issue? 

Thanks,
Jaleks