I can not connect to rutorrent without an open session

After connect with ssh session rutorrent works, but when logout shows error “Bad response from server: (500 [error list]) Link to XMLRPC failed May be, rTorrent is down.?”. rTorrent stays on, downloading and uploading.
rTorrent starts as a service systemd:

osmc@osmc:~$ cat .config/systemd/user/rt.service 
[Unit]
Description=rTorrent
After=network.target

[Service]
Type=oneshot
RemainAfterExit=yes

ExecStart=/usr/bin/screen -d -m -fa -S rtorrent /usr/bin/rtorrent
ExecStop=/usr/bin/killall -w -s 2 /usr/bin/rtorrent

[Install]
WantedBy=multi-user.target



osmc@osmc:~$ systemctl --user enable rt
osmc@osmc:~$ systemctl --user start rt

When manually start rTorrent no problem:

osmc@osmc:~$ screen -d -m -S rtorrent /usr/bin/rtorrent