An error occurred while calling cart.info

[cglantschnig-zz]

I am calling the method cart.info like that:

magento.checkoutCart.info({ quoteId: 676 }, magentoCallback);

I have magento 1.9.1 with the sample data installed. When I use an id that already existed in the sample data, then this works fine, but if I use an id from an cart of an customer I created, then I always get the following error:

{
    "original": {
        "message": "Unknown XML-RPC tag 'BR'",
        "name": "Error"
    },
    "name": "Magento Error",
    "message": "An error occurred while calling cart.info"
}

[chrisjhoughton]

That's the error I got with PHP server issues