Clicking on "brand"/"brand_image" element of sidebar leads to html website with no styling

[Int-Circuit]

Hi, I am having a problem with my website using your theme.

When I click on the brand_image/brand element of my website I get a page with no styling.

heri is my repo : https://gitlab.com/integrated-circuit/Profile-io

My config is the following
baseURL = "https://integrated-circuit.gitlab.io/Profile-io/"
languageCode = "en-us"
theme = "poison"
title = "Profile.io"
paginate = 10
pluralizelisttitles = false # removes the automatically appended "s" on sidebar entries
canonifyURLs = true
# NOTE: If using Disqus as commenting engine, uncomment and configure this line
# disqusShortname = "yourDisqusShortname"

[params]
    brand = "Profile.io"                      # name of your site - appears in the sidebar
    brand_image = "/image/avatar.png"    # path to the image shown in the sidebar
    description = "A place talking about Electrical Engineering (EE) and linux" # Used as default meta description if not specified in front matter
    dark_mode = true                      # optional - defaults to false
    favicon = "/image/favicon48x48.png"             # path to favicon (defaults to favicon.png)
    front_page_content = ["posts", "projects"]
    # MENU PLACEHOLDER
    # Menu dict keys:
        # Name:         The name to display on the menu.
        # URL:          The directory relative to the content directory.
        # HasChildren:  If the directory's files should be listed.  Default is true.
        # Limit:        If the files should be listed, how many should be shown.
    menu = [
        {Name = "About", URL = "/about/", HasChildren = false},
        {Name = "Posts", URL = "/posts/", Pre = "Recent", HasChildren = true, Limit = 2},
        {Name = "Projects", URL = "/projects/", Pre = "Latest", HasChildren = true, Limit = 2},
    ]

    # Links to your socials.  Comment or delete any you don't need/use. 
    email_url = "mailto://joussemetmathis@gmail.com"
    gitlab_url = "https://gitlab.com/integrated-circuit"
    linkedin_url = "https://linkedin.com/in/mathis-joussemet"
    mastodon_url = "https://mastodon.social/@icircuit"
    matrix_url = "https://matrix.to/#/@integrated-circuit:matrix.org"


    # NOTE: If you don't want to use RSS, comment or delete the following lines
    # Adds an RSS icon to the end of the socials which links to {{ .Site.BaseURL }}/index.xml
    rss_icon = true
    # Which section the RSS icon links to, defaults to all content. See https://gohugo.io/templates/rss/#section-rss
    rss_section = "posts"

    # Hex colors for your sidebar.
    moon_sun_background_color = "#515151"   # default is #515151
    moon_sun_color = "#FFF"                 # default is #FFF
    sidebar_a_color = "#FFF"                # default is #FFF
    sidebar_bg_color = "#202020"            # default is #202020
    sidebar_h1_color = "#FFF"               # default is #FFF
    sidebar_img_border_color = "#515151"    # default is #515151
    sidebar_p_color = "#909090"             # default is #909090
    sidebar_socials_color = "#FFF"          # default is #FFF

    # Hex colors for your content in light mode.
    code_color = "#000"                     # default is #000
    code_background_color = "#E5E5E5"       # default is #E5E5E5
    code_block_color = "#FFF"               # default is #FFF
    code_block_background_color = "#272822" # default is #272822
    content_bg_color = "#FAF9F6"            # default is #FAF9F6
    date_color = "#515151"                  # default is #515151
    link_color = "#268BD2"                  # default is #268BD2
    list_color = "#5A5A5A"                  # default is #5A5A5A
    post_title_color = "#303030"            # default is #303030
    table_border_color = "#E5E5E5"          # default is #E5E5E5
    table_stripe_color = "#F9F9F9"          # default is #F9F9F9
    text_color = "#222"                     # default is #222

    # Hex colors for your content in dark mode
    code_color_dark = "#FFF"                        # default is #FFF
    code_background_color_dark = "#515151"          # default is #515151
    code_block_color_dark = "#FFF"                  # default is #FFF
    code_block_background_color_dark = "#272822"    # default is #272822
    content_bg_color_dark = "#121212"               # default is #121212
    date_color_dark = "#9A9A9A"                     # default is #9A9A9A
    link_color_dark = "#268BD2"                     # default is #268BD2
    list_color_dark = "#9D9D9D"                     # default is #9D9D9D
    post_title_color_dark = "#DBE2E9"               # default is #DBE2E9
    table_border_color_dark = "#515151"             # default is #515151
    table_stripe_color_dark = "#202020"             # default is #202020
    text_color_dark = "#EEE"                        # default is #EEE

    # NOTE: If using Remark42 as commenting engine, uncomment and configure these lines
    # remark42 = true
    # remark42_host = "https://yourhost.com"
    # remark42_site_id = "your_site_id"
    
    # NOTE: The following three params are optional and are used to create meta tags + enhance SEO.
    # og_image = ""                       # path to social icon - front matter: image takes precedent, then og_image, then brand_url
                                          # this is also used in the schema output as well. Image is resized to max 1200x630
                                          # For this to work though og_image and brand_url must be a path inside the assets directory
                                          # e.g. /assets/images/site/og-image.png becomes images/site/og-image.png
    # publisher_icon = ""                 # path to publisher icon - defaults to favicon, used in schema
[params.meta]
    favicon = true
[taxonomies]
    series = 'series'
    tags = 'tags'

before clicking on "brand"

after clicking on "brand"