MDNS_WiFiWebServer example not working as expected

The serial monitor says the board is listening on http://wifi101.local/

When I try to load that page in a browser (iPhone, computer, ...) the loading times out and the serial monitor never shows a client connected.

However, if I load the page using the IP address printed on the serial monitor, the page loads fine.

I'm using the MDNS_WiFiWebServer example sketch that is part of the WiFi101 library. I have a MKR1000 board.

Am I missing something?