I've seen the question asked a number of times but everywhere I checked it there was only a workaround offered (delete libreoffice directory in ~/.config/username). So I have to do it after each restart, and the styles I change never get saved into my profile.
The fatal error I get is
The application cannot be started User installation could not be completed
I gather it has something to do with the permissions, but I am very new to Linux (Ubuntu 15.04 in my case) and need assistance here.