Sync problem, IllegalArgumentException

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I bought this app two days ago but it isn’t able to sync my owncloud calendars. I used Owncloud 8.0 (on private webspace) and the error appeared. I decided to upgrade to the latest Owncloud version 9.1.4, but still same problem. Some exception is always risen inside Davdroid. The stack trace looks like this is a problem only for a specific event, but I’m not sure.

Device: Samsung Galaxy S2, Android 7.1 (LineageOS 14.1)
Multiple calendar clients are synced using Owncloud (iPhone, iCal, Thunderbird) and it’s working fine, except Davdroid.

debug.txt:
https://paste.fedoraproject.org/paste/1cxrbJ8CvHhH42CQyNXZKV5M1UNdIGYhyRLivL9gydE=

.ics file that seems to fail:
https://paste.fedoraproject.org/paste/RnwxSBrvqHuisjlrdFvIel5M1UNdIGYhyRLivL9gydE=

Can you help? Thanks

Seems like an invalid iCalendar. Can you post the (anonymized) contents of http://fralima.com/cloud/remote.php/dav/calendars/fralima/persönlich/5d81f72b-ec0c-42de-bb8f-4188d8d6d64d.1480103713308.ics?

This is the file I already linked in my previous post.

@saum_ Sorry didn’t see that.

The for the report. I could reproduce the problem. It should be fixed with ical4android/be1e1e9b.

It works fine now. Thank you for quick reaction and bugfixing!