Torrent Config results in "must be valid Host without http://" every time

[darkimagesoflight]

I have attempted to configure both uTorrent and Deluge. I have sucuessfully configured the Web UI of uTorrent at “localhost:9091/gui/” and deluge at “localhost:8112/” and know the username and password for both.
Every time I attempt to enter this information into Sonarr, I am greeted with the message "must be valid Host without http://"
I leave off the http:// before the local host addresses and continue to get the error.
What am I doing wrong?

[Taloth]

http://localhost:9091/gui

Protocol: http://
Hostname: localhost
Port: :9091
Path: /gui