Ok, after some reinstalling and reconfiguring I have Abyss webserver (Debian Linux) working with COPS!
It works both inside and outside of the COPS directory/folder.
If it works for me, it should work for you!
I suggest starting with putting the calibre folder with
all files inside of the COPS directory [../htdocs/cops/e-book].
If this works then change the
Code:
$config['calibre_directory'] = './e-book/';
to
Code:
$config['calibre_directory'] = '/Users/peter/Dropbox/Public/E-books/';
Good luck!