First time setup can be a challenge. Is Pi connected to your network be Ethernet cable? If not the WiFi needs to be configured for your network. Attach a screen and keyboard to the Pi while on ethernet, then use Network page to add your wifi credentials. I don't recall the login screen you see but I can't remember all the details for Rune 3 as it's quite old. Most of us have migrated to it's successor - raudio.
Same great feel of the original Rune but with many important updates and improvements.