Hallo Zoglo,
wow vielen Dank für die prompte Antwort am späten Sonntag.
Durch den Debug modus habe ich config/config.yml von dem Zeichensatz bereinigen können.
	Code:
	doctrine:
    dbal:
        connections:
            default:
                default_table_options:
                    charset: utf8
                    collate: utf8_unicode_ci
 Hier meine composer.json:
	Code:
	{
    "type": "project",
    "require": {
        "contao-community-alliance/merger2": "^4.2",
        "contao/calendar-bundle": "4.9.*",
        "contao/conflicts": "*@dev",
        "contao/manager-bundle": "4.9.*",
        "contao/news-bundle": "4.9.*",
        "markocupic/contao-component-bootstrap": "4.5.*",
        "markocupic/contao-component-fontawesome-free": "5.13.0",
        "netzmacht/contao-font-awesome-inserttag": "^2.2",
        "terminal42/contao-changelanguage": "^3.1",
        "terminal42/notification_center": "^1.5"
    },
    "extra": {
        "contao-component-dir": "assets"
    },
    "scripts": {
        "post-install-cmd": [
            "Contao\\ManagerBundle\\Composer\\ScriptHandler::initializeApplication"
        ],
        "post-update-cmd": [
            "Contao\\ManagerBundle\\Composer\\ScriptHandler::initializeApplication"
        ]
    },
    "config": {
        "allow-plugins": {
            "composer/package-versions-deprecated": false,
            "contao-components/installer": false,
            "contao/manager-plugin": false,
            "contao-community-alliance/composer-plugin": false
        }
    }
}
 Stacktrace / Dev Log:
	Code:
	[2024-02-25 18:52:18] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was not able to match, message "No routes found for "/home.html/"." [] []
[2024-02-25 18:52:18] request.INFO: Matched route "tl_page.2". {"route":"tl_page.2","route_parameters":{"_token_check":true,"_controller":"Contao\\FrontendIndex::renderPage","_scope":"frontend","_locale":"de","pageModel":"[object] (Contao\\PageModel: {})","parameters":"","_route":"tl_page.2"},"request_uri":"https://www.kai-semor.com/home.html","method":"GET"} []
[2024-02-25 18:52:18] security.INFO: Populated the TokenStorage with an anonymous Token. [] []
[2024-02-25 18:52:18] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was not able to match, message "No routes found for "/home.html/"." [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Router Symfony\Bundle\FrameworkBundle\Routing\Router was unable to generate route. Reason: 'Route 'contao_frontend' not found': Unable to generate a URL for the named route "contao_frontend" as such route does not exist. [] []
[2024-02-25 18:52:19] app.DEBUG: Executing cron job "Contao\CoreBundle\Cron\LegacyCron::onMinutely" [] []
[2024-02-25 18:52:20] request.INFO: Matched route "_wdt". {"route":"_wdt","route_parameters":{"_route":"_wdt","_controller":"web_profiler.controller.profiler::toolbarAction","token":"367c10"},"request_uri":"https://www.kai-semor.com/_wdt/367c10","method":"GET"} []
[2024-02-25 18:52:21] request.INFO: Matched route "_wdt". {"route":"_wdt","route_parameters":{"_route":"_wdt","_controller":"web_profiler.controller.profiler::toolbarAction","token":"367c10"},"request_uri":"https://www.kai-semor.com/_wdt/367c10","method":"GET"} []
 über contao/install kann ich leider die Datenbankänderungen auch nicht vollziehen, trotz positiver Rückmeldung.
Aber ein Schritt weiter bin ich ja schonmal gekommen 