I've got the same problem here. Just bought Stellarmate OS 1.5.4 and installed on my Raspberry Pi 8GB with a 128GB SD card. I can get it to boot initially, but can't connect or get response after update.

I also tried booting from USB 3.0, but for some reason the wifi won't work when I boot from the USB, so I can't connect with the app, VNC, etc.

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