I have a brand-new Ultimaker 3 with firmware version 4.3.3.20180529 which I'm trying to connect to WiFi. The printer doesn't proceed past "Printer is creating a WiFi hotspot. This will take a minute.". What I've tried:
power-cycle printer
factory-reset printer
attempt update firmware over wired LAN: I get "Your Ultimaker 3 is running the latest stable firmware", and no update takes place
update over USB (with LAN disconnected). This seemed to complete successfully, but and I still have 4.3.3.20180529.
What else can I try to get WiFi working? It's inconvenient to run a LAN cable to the printer.