Hello,
Im experiencing this problem quite some time now.
There is a certain folder in our owncloud server that I cannot access to through the app.
If I log in to our server online, I can see the folder perfectly, but when I try to sync folders on my computer from the app, this folder simply isn´t there. At first I supposed I had to wait for the sync to be completed, but its been a week now 
I´ve tried logging in from a colleages acount and share the file with my accout, still doesn´t work.
Any ideas?
Thanks a lot in advance