@Tiberius1976 It seems that you’re affected by the problems with the version from Amazon, too. Others have this problem as well. Have a look here: https://forums.bitfire.at/topic/766/amazon-store-ical4j-exception-when-syncing-calendars
Does not seem to sync 'Organisation'
I sync Android with Owncloud and have found that the 'Organization Field is not syncd in either direction.
Is this possible to correct?
I installed on a second device and it worked with Organisation on that - so I uninstalled from the first device and when I re-installed it worked there too.