Impossible to access to the tool with reverse proxy

[Lurikbolding]

Problem/Motivation

after installation, the menu entry is not added to the Home Assistant menu on the left
I click on "open the web interface", but it open a new page with the port 9541

but my installation is with a reverse proxy, so access with port is forbidden.
Only tools which have entry in the Home Assistant menu are available (any url / folder on the https port 443)

Expected behavior

Find the tool in the menu as show in the documentation

Actual behavior

The tool open a new page with "port access"

Steps to reproduce

Install the tool
set ssl on off in the configuration
start the tool
open the "web interface"