visual.getCapabilities() is not working

The below seems working:

report.on('loaded', function () {
        report.getPages()
            .then(function (pages) {
                var activePage = pages.filter(function (page) {
                    return page.isActive
                })[0];
                console.log(activePage);
                activePage.getVisuals()
                    .then(function (visuals) {
                        let visual1 = visuals[visuals.length - 1];
                        console.log(visual1);

                        //getCapabilities
                        visual1.getCapabilities()
                            .then(function (capabilities) {
                            console.log(capabilities);
                            })
                            .catch(function (errors) {
                                console.log(errors);
                            });

                        //getDataFields
                        visual1.getDataFields('Y')
                            .then(function (dataFields) {
                                console.log("Visual 'Y' fields:");
                                console.log(dataFields);
                            })
                            .catch(function (errors) {
                                console.log(errors);
                            });

            })
            .catch(function (error) {
                console.log(error);
            });
    })