After upgrading to 24.04 I keep getting this message.
The RSync service wasn’t present in 24.04 and should have been deleted by now. However I added my own rsync service by configuring a postinit script in System/Advanced. Maybe this triggers this message. This script is in /root/rsyncd.sh and contains:
#!/bin/bash
/usr/bin/rsync --daemon --config=/root/rsyncd.conf