Home Assistant installed and running as service but cannot access - 400: Bad Request

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The “support” category is meant to ask for help or troubleshooting related to installing or using YunoHost or its applications. It is not to ask assistance on general system administration, network administration or special use cases that goes beyond the scope of the project. If you wish to discuss more advanced use case, please post in the “Advanced Use Case” category.

Before posting, please :

My YunoHost server

**Hardware:**Raspberry Pi at home.
YunoHost version: 11.0.11 (stable).
I have access to my server : Through SSH | through the webadmin
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no
If yes, please explain:
If your request is related to an app, specify its name and version:
Home Assistant - 2023.1.6~ynh1

Description of my issue

Hello to all. I have a new installation of YNH 11.0.11 (stable), an an RPI 4 model - 2GB. I have installed the HomeAssistant app, in a subdomain, e.g. hassio.mydomain.nohost.me. Installation is done from cli, as the RPI is running headless.

The problem, I’m facing is that when I’m trying to connect to Home Assistant domain, I get a 400: Bad Request.
Home Assistant service is running, but I cannot log in, as I don get a loggin screen, nor can I access instance from localhost.

Before this installation on RPI in Yunohost, I have tried using Home Assistant in a VM machine, and everything went well.

I know that I have to make some more configuration, but I have no clue where to start.
Any helpful soul, to assist me on this problem will be very much appreciated.

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