Allow Plugins Error During Setup

When setting up a new installation of Contao 4.13 there has been instances of errors on June where Composer will stop with an error saying your trying to install a plugin which isn't allowed. In order to fix this you need to first add the code below to the composer.json file then delete the 'public_html/vendor' folder and rerun the installation. This will allow you to continue on through to the end.

"config": {
	"allow-plugins": true
}

After adding the code to the 'composer.json' file, it will look like the following:

{
    "type": "project",
    "require": {
        "contao/conflicts": "*@dev",
        "contao/manager-bundle": "4.13.*",
        "contao/calendar-bundle": "4.13.*",
        "contao/comments-bundle": "4.13.*",
        "contao/faq-bundle": "4.13.*",
        "contao/listing-bundle": "4.13.*",
        "contao/news-bundle": "4.13.*",
        "contao/newsletter-bundle": "4.13.*"
    },
    "extra": {
        "public-dir": "web",
        "contao-component-dir": "assets"
    },
    "scripts": {
        "post-install-cmd": [
            "@php vendor/bin/contao-setup"
        ],
        "post-update-cmd": [
            "@php vendor/bin/contao-setup"
        ]
    },
    "config": {
    	"allow-plugins": true
    }
}