Code:
	{
    "type": "project",
    "require": {
        "codefog/contao-cookiebar": "^2.4.1",
        "contao/calendar-bundle": "4.9.29",
        "contao/comments-bundle": "4.9.29",
        "contao/conflicts": "*@dev",
        "contao/faq-bundle": "4.9.29",
        "contao/listing-bundle": "4.9.29",
        "contao/manager-bundle": "4.9.29",
        "contao/news-bundle": "4.9.29",
        "contao/newsletter-bundle": "4.9.29",
        "do-while/contao-backupdb-bundle": "^1.5.3",
        "madeyourday/contao-rocksolid-antispam": "^2.0",
        "madeyourday/contao-rocksolid-slider": "^2.0"
    },
    "extra": {
        "contao-component-dir": "assets"
    },
    "scripts": {
        "post-install-cmd": [
            "Contao\\ManagerBundle\\Composer\\ScriptHandler::initializeApplication"
        ],
        "post-update-cmd": [
            "Contao\\ManagerBundle\\Composer\\ScriptHandler::initializeApplication"
        ]
    }
}
 Wie gesagt, Cookiebar taucht nicht mal im Backend auf. Hab bei github ein issue eröffnet.