I believe the UI option is no longer available with **1.3.1+**. As far as I know the UI option only allows to generate some basic influx db commands and does not allow to manipulate / query data from UI.

Regarding the error, I just ignore that and I have not seen that error causing any issues / side effects.

[Visit Topic](https://community.influxdata.com/t/localhost-8086-shows-404-page-not-found-how-do-i-see-the-gui/2364/2) to respond.

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