The Lets Encrypt ACME server was probably unable to reach

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5

Hi @mjozo8

looks like you need an additional mime type, so that files without file-extension are send. Add something like

<configuration>
    <system.webServer>
        <staticContent>
            <mimeMap fileExtension="." mimeType="text/plain" />
        </staticContent>
    </system.webServer>
</configuration>

Create a file

/.well-known/acme-challenge/text

without extension and test, if you can load this with your browser.