OpenHab3 Sitemaps BasicUI Frame and Icon not working

Setup, Configuration and Use Items & Sitemaps
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  • Platform information:
    • Hardware: Raspberry PI 3
    • OS: Raspbian GNU / Linux 11 (bulleye)
    • Java Runtime Environment: V11.0.18
    • openHAB version: V3
  • Issue of the topic: We create a BasicUI through the command line, writing the code in the sitemaps
    folder with the name default.sitemaps. We specify the sitemap name in the settings → Basic UI.

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Here is the code we develop, and here is what we see in the browser.

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The code is correct, since we have a similar code running in another Raspberry Pi, can you support us?