AirPort Extreme and AirPort Express no longer detected
After the recent update to macOS Sequoia 15.1.1 AirPort Extreme and its slave AirPort Express are no longer detected.
iMac 24″, macOS 15.1
The name of my LAN, configured on an AirPort Extreme is Gent-AE. The network consisted of Internet --> AirPort Extreme --> AirPort Express. Neither AirPort can be detected anymore. However The LAN still functions through an ethernet cable or wireless for my iMac and wireless for my iPad and iPhone. I use AirPort configuration program version 6.3.9 from Nov. 15, 2024 and operating system macOS Sequoia. The AirPort configuration program says (translated from Dutch) No configured AirPort-base stations found. The program continues searching. It means I have Internet access but my LAN doesn't function properly. See added screenshot.
