ok, when I switch in the config file to 'use_short_form' I get an overview with short descriptions and so on. When I click on Book Details I get the same error as before, but as I dont need the details that doesnt matter.
I still cant download a book as the server cant find the books.
I am using symlinks on my server, is it possible that this causes a problem with the path to the files?
Many thanks for your help!