I was able to set the URL using the following against my database:
insert into oc_appconfig(appid, configkey, configvalue) values ('richdocuments','wopi_url','https://[your url here]');
Now I can open the page that shows the document list. When I open a document, I’m now also getting the We are sorry, this is an unexpected connection error. message.
I’ve disabled apparmor and running in --privileged mode.
Here’s what I see (repeated ad nauseum):
frk-00031-00 00:00:01.392604 [ loolforkit ] Preinit stage OK.
frk-00031-00 00:00:01.392685 [ loolforkit ] Forking a loolkit process.
frk-00031-00 00:00:01.396012 [ loolforkit ] Forked kit [35].
frk-00031-00 00:00:01.396135 [ loolforkit ] ForKit process is ready.
kit-00035-00 00:00:01.396303 [ loolforkit ] Initializing kit
kit-00035-00 00:00:01.396393 [ loolforkit ] Log level is [8].
kit-00035-00 00:00:01.396457 [ loolkit ] Process started.
kit-00035-00 00:00:01.396579 [ loolkit ] Jail path: /opt/lool/child-roots/35/
kit-00035-00 00:00:01.396950 [ loolkit ] symlink("../lo","/opt/lool/child-roots/35/opt/collaboraoffice5.1")
kit-00035-00 00:00:01.592696 [ loolkit ] link("/opt/collaboraoffice5.1/readmes/README_en-US","/opt/lool/child-roots/35/lo/readmes/README_en-US") failed. Exiting. (errno: Operation not permitted)