New installation HA version 2026.8.3 with CONTAINER

Installation
1

When performing a fresh installation of version 2026.8.3 using Container, the ONBOARDING process does not complete.

It gets stuck on the “final” page where the options for “Help us help you” are configured.

Clicking “NEXT” displays the pop-up message “Failed to save: Unknown command.”

Any ideas? Thanks.

2

Can you share your compose file?

3

The container is installed on a Synology NAS.
Below is the JSON file obtained by exporting the container’s configuration.

> {
>    "CapAdd" : null,
>    "CapDrop" : null,
>    "cmd" : "",
>    "cmd_v2" : "",
>    "cpu_priority" : 50,
>    "enable_publish_all_ports" : false,
>    "enable_restart_policy" : false,
>    "enable_service_portal" : false,
>    "enabled" : true,
>    "env_variables" : [
>       {
>          "key" : "PATH",
>          "value" : "/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
>       },
>       {
>          "key" : "LANG",
>          "value" : "C.UTF-8"
>       },
>       {
>          "key" : "S6_BEHAVIOUR_IF_STAGE2_FAILS",
>          "value" : "2"
>       },
>       {
>          "key" : "S6_CMD_WAIT_FOR_SERVICES_MAXTIME",
>          "value" : "0"
>       },
>       {
>          "key" : "S6_CMD_WAIT_FOR_SERVICES",
>          "value" : "1"
>       },
>       {
>          "key" : "S6_SERVICES_READYTIME",
>          "value" : "50"
>       },
>       {
>          "key" : "PIP_EXTRA_INDEX_URL",
>          "value" : "https://wheels.home-assistant.io/musllinux-index/"
>       },
>       {
>          "key" : "UV_EXTRA_INDEX_URL",
>          "value" : "https://wheels.home-assistant.io/musllinux-index/"
>       },
>       {
>          "key" : "S6_SERVICES_GRACETIME",
>          "value" : "240000"
>       },
>       {
>          "key" : "UV_SYSTEM_PYTHON",
>          "value" : "true"
>       },
>       {
>          "key" : "UV_NO_CACHE",
>          "value" : "true"
>       },
>       {
>          "key" : "TZ",
>          "value" : "Europe/Rome"
>       }
>    ],
>    "exporting" : false,
>    "id" : "0d8e79ff524bbfba5c2488b7b6296ec2ed1ced2dad766ba0a698efc87b5390bd",
>    "image" : "homeassistant/home-assistant:latest",
>    "is_ddsm" : false,
>    "is_package" : false,
>    "labels" : {
>       "io.hass.arch" : "aarch64",
>       "io.hass.base.arch" : "aarch64",
>       "io.hass.base.image" : "ghcr.io/home-assistant/base:3.24",
>       "io.hass.base.name" : "python",
>       "io.hass.base.version" : "2026.06.1",
>       "io.hass.type" : "core",
>       "io.hass.version" : "2026.8.3",
>       "org.opencontainers.image.authors" : "The Home Assistant Authors",
>       "org.opencontainers.image.created" : "2026-08-21 20:49:36+00:00",
>       "org.opencontainers.image.description" : "Open-source home automation platform running on Python 3",
>       "org.opencontainers.image.documentation" : "https://www.home-assistant.io/docs/",
>       "org.opencontainers.image.licenses" : "Apache-2.0",
>       "org.opencontainers.image.source" : "https://github.com/home-assistant/core",
>       "org.opencontainers.image.title" : "Home Assistant",
>       "org.opencontainers.image.url" : "https://www.home-assistant.io/",
>       "org.opencontainers.image.version" : "2026.8.3"
>    },
>    "links" : [],
>    "memory_limit" : 0,
>    "name" : "homeassistant-home-assistant",
>    "network" : [
>       {
>          "driver" : "host",
>          "name" : "host"
>       }
>    ],
>    "network_mode" : "host",
>    "port_bindings" : [],
>    "privileged" : false,
>    "service_portals" : [],
>    "shortcut" : {
>       "enable_shortcut" : false,
>       "enable_status_page" : false,
>       "enable_web_page" : false,
>       "web_page_url" : ""
>    },
>    "use_host_network" : true,
>    "version" : 2,
>    "volume_bindings" : [
>       {
>          "host_volume_file" : "/docker/homeassistant",
>          "is_directory" : true,
>          "mount_point" : "/config",
>          "type" : "rw"
>       }
>    ]
> }
4

How long did you wait?