ICAL - Fehlermeldung

[baluderbär]

Hallo zusammen,

seit einigen Tagen bekomme ich periodisch (Updatezeit des Adapters) folgende Fehlermeldung:

ical.0	2017-10-22 14:15:04.449	error	at emitTwo (events.js:87:13)
ical.0	2017-10-22 14:15:04.449	error	at Request.self.callback (C:\ioBroker\node_modules\iobroker.ical\node_modules\request\request.js:188:22)
ical.0	2017-10-22 14:15:04.449	error	at Request._callback (C:\ioBroker\node_modules\iobroker.ical\main.js:170:23)
ical.0	2017-10-22 14:15:04.449	error	at C:\ioBroker\node_modules\iobroker.ical\main.js:186:25
ical.0	2017-10-22 14:15:04.449	error	at Object.parseICS (C:\ioBroker\node_modules\iobroker.ical\node_modules\node-ical\ical.js:408:20)
ical.0	2017-10-22 14:15:04.449	error	at Object.handleObject (C:\ioBroker\node_modules\iobroker.ical\node_modules\node-ical\ical.js:369:41)
ical.0	2017-10-22 14:15:04.449	error	at Object.ical.objectHandlers.END (C:\ioBroker\node_modules\iobroker.ical\node_modules\node-ical\node-ical.js:46:23)
ical.0	2017-10-22 14:15:04.449	error	at Function.RRule.fromString (C:\ioBroker\node_modules\iobroker.ical\node_modules\node-ical\node_modules\rrule\lib\rrule.js:1467:28)
ical.0	2017-10-22 14:15:04.449	error	at Function.RRule.parseString (C:\ioBroker\node_modules\iobroker.ical\node_modules\node-ical\node_modules\rrule\lib\rrule.js:1453:42)
ical.0	2017-10-22 14:15:04.449	error	at Object.dateutil.untilStringToDate (C:\ioBroker\node_modules\iobroker.ical\node_modules\node-ical\node_modules\rrule\lib\rrule.js:210:19)
ical.0	2017-10-22 14:15:04.449	error	Error: Invalid UNTIL value: 20171014T000000
ical.0	2017-10-22 14:15:04.447	error	uncaught exception: Invalid UNTIL value: 20171014T000000

Das Verhalten trat schon vor dem 14.10. auf. Daraufhin löschte ich alle Termine an diesem Tag - jedoch blieben die Fehlermeldungen.

Hat jemand eine Idee woran es liegen kann?

Viele Grüße

Martin