Hello, I'd love to try the Unofficial Sonos Controller, however I'm hitting an issue right at the beginning.

Environment

• I'm on Fedora 34 and have installed the official RPM 0.2.5 from the Releases page.
• Here's the list of my opened ports as listed by the active firewalld:
  ports: 1025-65535/udp 1025-65535/tcp

Issue

• getting the eternal "Searching for your Sonos system..." even though the speaker is on the same network (I can see its IP from the Android app) and my ports shouldn't be blocked by the firewall
• tried the Developer -> Add IP manually but I only get this, I'd probably call it pop-under (see the faint window under the overlay)
• doesn't seem like I can type into the underlying window/form
  

Is there anything else I can do about this?