IIS 8.5 Server HTTP-Fehler 500.19 - Internal Server Error

<?xml version="1.0" encoding="UTF-8"?>  
<!--

    IIS configuration sections.

    For schema documentation, see
    %windir%\system32\inetsrv\config\schema\IIS_schema.xml.
    
    Please make a backup of this file before making any changes to it.

-->

<configuration>

    <!--

        The <configSections> section controls the registration of sections.
        Section is the basic unit of deployment, locking, searching and
        containment for configuration settings.
        
        Every section belongs to one section group.
        A section group is a container of logically-related sections.
        
        Sections cannot be nested.
        Section groups may be nested.
        
        <section
            name=""  [Required, Collection Key] [XML name of the section]  
            allowDefinition="Everywhere" [MachineOnly|MachineToApplication|AppHostOnly|Everywhere] [Level where it can be set]  
            overrideModeDefault="Allow"  [Allow|Deny] [Default delegation mode]  
            allowLocation="true"  [true|false] [Allowed in location tags]  
        />
        
        The recommended way to unlock sections is by using a location tag:
        <location path="Default Web Site" overrideMode="Allow">  
            <system.webServer>
                <asp />
            </system.webServer>
        </location>

    -->
    <configSections>
        <sectionGroup name="system.applicationHost">  
            <section name="applicationPools" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
            <section name="configHistory" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
            <section name="customMetadata" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
            <section name="listenerAdapters" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
            <section name="log" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
            <section name="serviceAutoStartProviders" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
            <section name="sites" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
            <section name="webLimits" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
        </sectionGroup>

        <sectionGroup name="system.webServer">  
            <section name="asp" overrideModeDefault="Deny" />  
            <section name="caching" overrideModeDefault="Allow" />  
            <section name="cgi" overrideModeDefault="Deny" />  
            <section name="defaultDocument" overrideModeDefault="Allow" />  
            <section name="directoryBrowse" overrideModeDefault="Allow" />  
            <section name="fastCgi" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
            <section name="globalModules" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
            <section name="handlers" overrideModeDefault="Deny" />  
            <section name="httpCompression" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
            <section name="httpErrors" overrideModeDefault="Allow" />  
            <section name="httpLogging" overrideModeDefault="Deny" />  
            <section name="httpProtocol" overrideModeDefault="Allow" />  
            <section name="httpRedirect" overrideModeDefault="Allow" />  
            <section name="httpTracing" overrideModeDefault="Deny" />  
            <section name="isapiFilters" allowDefinition="MachineToApplication" overrideModeDefault="Deny" />  
            <section name="modules" allowDefinition="MachineToApplication" overrideModeDefault="Deny" />  
            <section name="applicationInitialization" allowDefinition="MachineToApplication" overrideModeDefault="Allow" />  
            <section name="odbcLogging" overrideModeDefault="Deny" />  
            <sectionGroup name="security">  
                <section name="access" overrideModeDefault="Deny" />  
                <section name="applicationDependencies" overrideModeDefault="Deny" />  
                <sectionGroup name="authentication">  
                    <section name="anonymousAuthentication" overrideModeDefault="Allow" />  
                    <section name="basicAuthentication" overrideModeDefault="Deny" />  
                    <section name="clientCertificateMappingAuthentication" overrideModeDefault="Deny" />  
                    <section name="digestAuthentication" overrideModeDefault="Deny" />  
                    <section name="iisClientCertificateMappingAuthentication" overrideModeDefault="Deny" />  
                    <section name="windowsAuthentication" overrideModeDefault="Deny" />  
                </sectionGroup>
                <section name="authorization" overrideModeDefault="Allow" />  
                <section name="ipSecurity" overrideModeDefault="Deny" />  
                <section name="dynamicIpSecurity" overrideModeDefault="Deny" />  
                <section name="isapiCgiRestriction" allowDefinition="AppHostOnly" overrideModeDefault="Deny" />  
                <section name="requestFiltering" overrideModeDefault="Allow" />  
            </sectionGroup>
            <section name="serverRuntime" overrideModeDefault="Deny" />  
            <section name="serverSideInclude" overrideModeDefault="Deny" />  
            <section name="staticContent" overrideModeDefault="Allow" />  
            <sectionGroup name="tracing">  
                <section name="traceFailedRequests" overrideModeDefault="Allow" />  
                <section name="traceProviderDefinitions" overrideModeDefault="Deny" />  
            </sectionGroup>
            <section name="urlCompression" overrideModeDefault="Allow" />  
            <section name="validation" overrideModeDefault="Allow" />  
            <sectionGroup name="webdav">  
                <section name="globalSettings" overrideModeDefault="Deny" />  
                <section name="authoring" overrideModeDefault="Deny" />  
                <section name="authoringRules" overrideModeDefault="Deny" />  
            </sectionGroup>
            <section name="webSocket" overrideModeDefault="Deny" />  
        </sectionGroup>
        <sectionGroup name="system.ftpServer">  
            <section name="log" overrideModeDefault="Deny" allowDefinition="AppHostOnly" />  
            <section name="firewallSupport" overrideModeDefault="Deny" allowDefinition="AppHostOnly" />  
            <section name="caching" overrideModeDefault="Deny" allowDefinition="AppHostOnly" />  
            <section name="providerDefinitions" overrideModeDefault="Deny" />  
            <sectionGroup name="security">  
                <section name="ipSecurity" overrideModeDefault="Deny" />  
                <section name="requestFiltering" overrideModeDefault="Deny" />  
                <section name="authorization" overrideModeDefault="Deny" />  
                <section name="authentication" overrideModeDefault="Deny" />  
            </sectionGroup>
            <section name="serverRuntime" overrideModeDefault="Deny" allowDefinition="AppHostOnly" />  
        </sectionGroup>
    </configSections>