I have 2 thoughts:
-
While I don’t use the Web Installer often, I’ve seen it display like that after a successful install. So, it might be fine. Assuming it’s still in the default Wifi settings, you could try and connect to it’s network (FluidNC) and connect via http://192.168.0.1 or http://fluidnc.local
That will let you upload files and you can also configure wifi via the main WebUI. -
I cooked an ESP32 and got that brownout message. I don’t think I was able to flash it in that state so I don’t know that this is what you are experiencing.
How to cook an ESP32 on your Jackpot (Don't do this)