Add to cart not working properly

Hi,
I have problem with add to cart ajax option, in ajax action response I have error, there is unescaped character.

it is the json that is transmitted:

I have this string twice \ / there is a space between the slash and the backslash ….

{
“notices”:”\n\t<div class=\”woocommerce-message\” role=\”alert\”>\n\t\tVoir le panier<\/a> «Aderma Exomega Control Gel Lavant Emollient Anti-Grattage» a \u00e9t\u00e9 ajout\u00e9 \u00e0 votre panier.\t<\/div>\n”,
“fragments”:{
“div.widget_shopping_cart_content”:”<div class=\”widget_shopping_cart_content\”>\n<div class=\”shopping-cart-widget-body wd-scroll\”>\n\t<div class=\”wd-scroll-content\”>\n\n\t\t\t\t\t\n\t\t\t<ul class=\”cart_list product_list_widget woocommerce-mini-cart \”>\n\n\t\t\t\t\t\t\t\t\t\t\t<li class=\”woocommerce-mini-cart-item mini_cart_item\” data-key=\”a981f2b708044d6fb4a71a1463242520\”>\n\t\t\t\t\t\t\t\tAfficher<\/a>\n\t\t\t\t\t\t\t\t×<\/a>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\”cart-info\”>\n\t\t\t\t\t\t\t\t\t<span class=\”wd-entities-title\”>\n\t\t\t\t\t\t\t\t\t\tAlphanova B\u00e9b\u00e9 Sun Lait Solaire SPF50+ 50 ml\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t<span class=\”quantity\”>1 × <span class=\”woocommerce-Price-amount amount\”><bdi>15,30 <span class=\”woocommerce-Price-currencySymbol\”>€<\/span><\/bdi><\/span><\/span>\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\”woocommerce-mini-cart-item mini_cart_item\” data-key=\”383b440962aa48e9b4bb8b51701bb76e\”>\n\t\t\t\t\t\t\t\tAfficher<\/a>\n\t\t\t\t\t\t\t\t×<\/a>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\”cart-info\”>\n\t\t\t\t\t\t\t\t\t<span class=\”wd-entities-title\”>\n\t\t\t\t\t\t\t\t\t\tAderma Exomega Control Gel Lavant Emollient Anti-Grattage\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t<span class=\”quantity\”>1 × <span class=\”woocommerce-Price-amount amount\”><bdi>16,69 <span class=\”woocommerce-Price-currencySymbol\”>€<\/span><\/bdi><\/span><\/span>\t\t\t\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t<\/ul><!– end product list –>\n\t\t\t\n\t\t\n\t<\/div>\n<\/div>\n\n<div class=\”shopping-cart-widget-footer\”>\n\t\n\t\t\t\t\t<p class=\”woocommerce-mini-cart__total total\”>\n\t\t\t\tSous-total\u00a0:<\/strong> <span class=\”woocommerce-Price-amount amount\”><bdi>31,99 <span class=\”woocommerce-Price-currencySymbol\”>€<\/span><\/bdi><\/span>\t\t\t<\/p>\n\t\t\n\t\t\t\t<div class=\”wd-progress-bar wd-free-progress-bar\”>\n\t\t\t<div class=\”progress-msg\”>\n\t\t\t\tajouter <span class=\”woocommerce-Price-amount amount\”>8,01 <span class=\”woocommerce-Price-currencySymbol\”>€<\/span><\/span> au panier pour avoir les frais de port offert !!\t\t\t<\/div>\n\t\t\t<div class=\”progress-area\”>\n\t\t\t\t<div class=\”progress-bar\” style=\”width: 79%\”><\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\n\t\t<p class=\”woocommerce-mini-cart__buttons buttons\”>Voir le panier<\/a>Commander<\/a><\/p>\n\n\t\t\n\t\n\t<\/div>\n<\/div>”,
“span.wd-cart-number_wd”:”\t\t<span class=\”wd-cart-number wd-tools-count\”>2 <span>articles<\/span><\/span>\n\t\t”,
“span.wd-cart-subtotal_wd”:”\t\t<span class=\”wd-cart-subtotal\”><span class=\”woocommerce-Price-amount amount\”><bdi>31,99 <span class=\”woocommerce-Price-currencySymbol\”>€<\/span><\/bdi><\/span><\/span>\n\t\t”,
“div.wd-free-progress-bar_wd”:”\t\t<div class=\”wd-progress-bar wd-free-progress-bar\”>\n\t\t\t<div class=\”progress-msg\”>\n\t\t\t\tajouter <span class=\”woocommerce-Price-amount amount\”>8,01 <span class=\”woocommerce-Price-currencySymbol\”>€<\/span><\/span> au panier pour avoir les frais de port offert !!\t\t\t<\/div>\n\t\t\t<div class=\”progress-area\”>\n\t\t\t\t<div class=\”progress-bar\” style=\”width: 79%\”><\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t”,
“div.berocket_wc_print_notices”:”<div class=\”berocket_wc_print_notices\”><\/div>”
},
“cart_hash”:”485a82b71f07d62de1c1a94067a3995c”
}