Elfin EW11a is not accessible

I have received an Elfin EW11a RS485 to Wifi converter. I have managed to power it up, and now the green LED is constantly on.
According to the manuals I found here and there, I should be able to connect to an open WiFi network that the device should be broadcasting, but I don’t see any open network (I have tried multiple laptops and phones in the proximity of the device).
When I press the reload button which is attached, nothing visible happens, whether I press it short, long or multiple times.

Does anyone have any suggestions how I can access the device’s configuration?