I have the same problem:
yes - flashed firmware
yes - wifi is setup (I set it up in m5burner the same way it's been working for lots of other devices, am I missing a step?)
maybe it can access the UIflow2 server - how can I tell?
yes - I'm trying to use uiflow2, not uiflow1 in the browser
yes - I've looked at the connection settings, can't manually add it using the mac address, have no way to find the token (doesn't show up in m5burner the way old devices do)