How to access UI in influxdb_2.0.0-alpha.15?

Following the docs to spin up InfluxDB v2 alpha 15, which was easy and straightforward, everything went well so I wanted to access the UI to setup something to get started.

Unfortunately, I got “404 page not found” while accessing it: http://:9999/
But I could access http://:9999/api/v2

Checking through the process and configuration, everything was good so curious what’s wrong.

FYI:

  1. influx setup worked too;
  2. Ports were fine:
# netstat -ntlp
...
tcp        0      0 0.0.0.0:9999            0.0.0.0:*               LISTEN      21705/influxd
tcp        0      0 127.0.0.1:4222          0.0.0.0:*               LISTEN      21705/influxd

In logs, I saw something like:

ts=2019-07-13T01:41:04.371373Z lvl=info msg=platform:/ log_id=0GbEz54l000 filename=/go/src/github.com/influxdata/influxdb/kit/tracing/tracing.go line=55 error="no span ID found in carrier" ot_trace_id=04263ec13cfe5002 ot_span_id=04263ec13cfe5001 ot_start=2019-07-13T01:41:04.371097Z ot_stop=2019-07-13T01:41:04.371365Z ot_duration=0.269ms

Note sure whether it’s relevant.