I am running the ownCloud desktop client 2.2.3 for Debian 8, jessie. Since a while the client shows me that version 2.3.1 is available, but unfortunately did I get the following error if I want to update the client.
Finally I'm at the end. These are the tings I have done before I now can start installing ownCloud on my Raspberry Pi.
The current version of ownCloud is 8.2.2 and this version would be better, cause it has full PHP7 support. But I will now install 8.1, cause there are some problems with 8.2.2 and the calendar app does not support PHP7 at the moment. But ownCloud 9 will come soon in 2016. The last time I have installed ownCloud is a while ago and so I will start with Manual Installation on Linux.