WebClient retrieving NULL as response body

I am invoking to a service with the following code:

WebClient.create().get()
                .uri("http://www.somehost.es/api/products/1319/?ws_key=DC63ZTBVVQLN9MHQPQ9UMTL2DSW55C63")
                .retrieve()
                .bodyToMono(String.class)
                .doOnSuccess(System.out::println)
                .block();

And NULL is printed. But when I copy that URL and paste it directly int Chrome, or into Postman, the body (which is XML) is correctly returned.

Why would WebClient return null instead?