Browser window is inactive - Can't retrieve an authorization code

[FJBDev]

Hello,
I have just discovered this library and was hoping to be able to use it.

The issue that I am encountering is the following :
I have created a sample code to retrieve an authorization code from the Dropox API (see code below).

 final UserAgent userAgent = new UserAgentImpl();
      AuthorizationResponse authorizationResponse;
      try {
         final URI authorizationEndpoint = new URI("https://www.dropbox.com/oauth2/authorize?" +
               "client_id=MYCLIENTID" +
               "&response_type=code" +
               "&force_reapprove=true");
         final URI redirectUri = new URI("");
         authorizationResponse = userAgent.requestAuthorizationCode(authorizationEndpoint,
               redirectUri);
         final String code = authorizationResponse.getCode();
         System.out.print("Authorization Code: ");
         System.out.println(code);
      } catch (final AuthorizationException | URISyntaxException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
      }

Once the browser window is loaded, if I enter my Dropbox credentials or if I use Google to authenticate myself, clicking on the Login button or Next doesn't trigger anything.

I don't see any exceptions being raised.

Thanks