Remote Login is required for publishing to a ~Sedna Player over the LAN. It is sometimes the case that Remote Login is enabled, however not for the user currently logged in while will cause issues when publishing content.
Quit the ~Sedna Player Application by pressing Command + Q
- Click the Apple Icon and select System Preferences
- Select Sharing
- Tick Remote Login and Select the All Users Radio button
- Close System Preferences and start the ~Sedna Player Application