Mount Time Capsule on Ubuntu 16.04

Hi All,
I have been an Apple user for a long time which I decided to move on :) However, I have backed up all my files on a Time Capsule (I used simple rsync command, so the files can be easily accessible).
I followed instructions on mounting Time Capsule but I just cannot mount the drive. I am directly connecting the Time Capsule to my desktop running Ubuntu 16.04.

I would highly appreciate any advice.

Cheers
Ashkan