Based on the error message you provided, it appears that the error is related to a missing favicon.ico file. The error is being triggered in the SvelteKit runtime server code, specifically in the respond.js file.

First check the src/app.html file. By default it includes a link tag in the head section with rel set to icon. The href on this tag, by default, is favicon.png. In this case replace the favicon.png file in the static folder of your project with your own favicon file. If you want to use a different file format or just change the file name, this is fine too. Just copy the new file to your static folder, then update that href to match.
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