The app tells me to press the button on the Hue, which I did (repeatedly after nothing happens) and ends up with the following Discovery log. (Using the latest software version for the Hue bridge)
2017-08-01 23:07:15 +0000: Starting disovery
2017-08-01 23:07:15 +0000: Making request to <NSURLRequest https://www.meethue.com/api/nupnp>
2017-08-01 23:07:15 +0000: Received Hue IP from web service: 192.168.178.22
2017-08-01 23:07:16 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:16 +0000: Authentication failed, will try to create username
2017-08-01 23:07:17 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:17 +0000: Authentication failed, will try to create username
2017-08-01 23:07:18 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:18 +0000: Authentication failed, will try to create username
2017-08-01 23:07:19 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:19 +0000: Authentication failed, will try to create username
2017-08-01 23:07:20 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:20 +0000: Authentication failed, will try to create username
2017-08-01 23:07:21 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:21 +0000: Authentication failed, will try to create username
2017-08-01 23:07:22 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:22 +0000: Authentication failed, will try to create username
2017-08-01 23:07:23 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:23 +0000: Authentication failed, will try to create username
2017-08-01 23:07:24 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:24 +0000: Authentication failed, will try to create username
2017-08-01 23:07:25 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:25 +0000: Authentication failed, will try to create username
2017-08-01 23:07:26 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:26 +0000: Authentication failed, will try to create username
2017-08-01 23:07:27 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:27 +0000: Authentication failed, will try to create username
2017-08-01 23:07:28 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:28 +0000: Authentication failed, will try to create username
2017-08-01 23:07:29 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:29 +0000: Authentication failed, will try to create username
2017-08-01 23:07:30 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:30 +0000: Authentication failed, will try to create username
2017-08-01 23:07:31 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:31 +0000: Authentication failed, will try to create username
2017-08-01 23:07:32 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:32 +0000: Authentication failed, will try to create username
2017-08-01 23:07:33 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:33 +0000: Authentication failed, will try to create username
2017-08-01 23:07:34 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:34 +0000: Authentication failed, will try to create username
2017-08-01 23:07:35 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:35 +0000: Authentication failed, will try to create username
2017-08-01 23:07:36 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:36 +0000: Authentication failed, will try to create username
2017-08-01 23:07:37 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:37 +0000: Authentication failed, will try to create username
2017-08-01 23:07:38 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:38 +0000: Authentication failed, will try to create username
2017-08-01 23:07:39 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:39 +0000: Authentication failed, will try to create username
2017-08-01 23:07:40 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:40 +0000: Authentication failed, will try to create username
2017-08-01 23:07:41 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:41 +0000: Authentication failed, will try to create username
2017-08-01 23:07:42 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:42 +0000: Authentication failed, will try to create username
2017-08-01 23:07:43 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:43 +0000: Authentication failed, will try to create username
2017-08-01 23:07:44 +0000: Attempting to authenticate to 192.168.178.22
2017-08-01 23:07:44 +0000: Authentication failed, will try to create username
2017-08-01 23:07:45 +0000: Discovery stopped
The app tells me to press the button on the Hue, which I did (repeatedly after nothing happens) and ends up with the following Discovery log. (Using the latest software version for the Hue bridge)