GetFeatureInfoUrl on layers

Hello, I am trying to get information from layers (I have my map, and 2 layers), my layers from Geoserver (localhost). My layers are displayed.

at this moment, how I create layers :

private OLSource afficheCalque(String calqueId) {
        //Variable
        Map<String, String> params = new HashMap<>();
        OLTileWMSSourceOptions options = new OLTileWMSSourceOptions();

        options.setUrl(CChaineCaractere.WORKSPACE);
        params.put(CChaineCaractere.LAYERS, calqueId);
        params.put(CChaineCaractere.FORMAT, CChaineCaractere.PNG);
        params.put("CRS", "EPSG:4326");
        options.setParams(params);

        return new OLTileWMSSource(options);
    }

 And, how I am trying get information from layers

((CarteSiteVue) vue).getMap().addClickListener(new OLMap.ClickListener() {

            @Override
            public void onClick(OLMap.OLClickEvent pClickEvent) {
                System.out.println(pClickEvent.getFeatureInfoUrls());
            }

        });

But my Urls don't give me results.. I have this error : 
{"type":"FeatureCollection","totalFeatures":"unknown","features":[],"crs":null}

What are my mistakes ?