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Hi The issue is likely with the UPS battery. Keep it plugged in until the light clears. The system needs time to charge the battery to the correct voltage, which usually takes 4 to 5 hours. If the issue persists, the battery may be damaged. Simply unplug it and it should start working.

Thanks! It worked flawlessly after I manually upgraded my Helios64 from version 24.11.1 to 25.2.3.

I assume you try to bridge your eth0 and wlan0. This thread might help you to achieve this. https://raspberrypi.stackexchange.com/questions/88954/workaround-for-a-wifi-bridge-on-a-raspberry-pi-with-proxy-arp Oli