Storybook: Le panneau Addons ne s'affiche pas - mais les boutons fonctionnent toujours (?)

Décrivez le bogue
J'utilise l'addon de boutons pour mon projet StencilJs et cela fonctionne techniquement (si je configure le composant prob dans l'histoire, il le change, par exemple: regardez le fichier d'histoire, puis le composant, vous verrez qu'il est en train de définir il - et il le fait). mais je ne peux pas voir le panneau des addons. Je pense avoir fait toute la configuration correctement (addons.js, package.json, etc.).

J'ai essayé de sélectionner l'option Afficher les addons à l'intérieur du livre de contes en cours d'exécution mais rien ne s'affiche.

Comment je l'exécute avec npm run storybook

Reproduire
Étapes pour reproduire le comportement:

1. Lancer le livre d'histoires
2. Aucun panneau d'extension n'est visible sur le côté ou en bas

Comportement prévisible
Je m'attends à voir le panneau des addons si j'ai un addon installé pour être utilisé

Captures d'écran

Extraits de code
Ci-dessous, mon .storybook / addons.js

import '@storybook/addon-a11y/register';
import '@storybook/addon-actions/register';
import '@storybook/addon-knobs/register';

Voici mon package.json

"scripts": {
    "build": "stencil build",
    "start": "stencil build --dev --watch --serve",
    "stencil.dev": "stencil build --dev --watch --docs",
    "storybook.dev": "./node_modules/.bin/start-storybook -p 8008 -c .storybook -s ./dist",
    "storybook": "npm run build && ./node_modules/.bin/concurrently  \"npm run stencil.dev\" \"npm run storybook.dev\"",
    "test": "stencil test --spec --e2e",
    "test.watch": "stencil test --spec --e2e --watch",
    "generate": "stencil generate"
  },
  "dependencies": {
    "@ionic/core": "^4.9.1"
  },
  "devDependencies": {
    "@stencil/core": "^1.7.0",
    "@stencil/less": "^1.0.0",
    "@stencil/utils": "0.0.5",
    "@stencil/webpack": "0.0.6",
    "@storybook/addon-a11y": "5.2.3",
    "@storybook/addon-actions": "5.2.3",
    "@storybook/addon-knobs": "5.2.3",
    "@storybook/addon-storysource": "5.2.3",
    "@storybook/addon-viewport": "5.2.3",
    "@storybook/addons": "5.2.3",
    "@storybook/cli": "5.2.3",
    "@storybook/html": "5.2.3",
    "@storybook/polymer": "5.2.3",
    "babel-core": "6.26.3",
    "babel-loader": "7.1.5",
    "babel-preset-env": "1.7.0",
    "lit-html": "1.1.1",
    "polymer-webpack-loader": "2.0.3",
    "ts-loader": "^5.4.5",
    "concurrently": "^4.1.0"
  }

Voici mon .storybook / config.js

import { addDecorator, addParameters, configure } from '@storybook/polymer';
import { withA11y } from '@storybook/addon-a11y';
import { withKnobs } from '@storybook/addon-knobs';
import 'sumai-frontend';

addParameters({
  options: {
    /**
     * name to display in the top left corner
     * <strong i="6">@type</strong> {String}
     */
    name: 'Sumai Components',
    /**
     * URL for name in top left corner to link to
     * <strong i="7">@type</strong> {String}
     */
    url: '#',
    /**
     * show story component as full screen
     * <strong i="8">@type</strong> {Boolean}
     */
    isFullscreen: false,
    /**
     * display panel that shows a list of stories
     * <strong i="9">@type</strong> {Boolean}
     */
    showNav: true,
    /**
     * display panel that shows addon configurations
     * <strong i="10">@type</strong> {Boolean}
     */
    showPanel: true,
    /**
     * display floating search box to search through stories
     * <strong i="11">@type</strong> {Boolean}
     */
    showSearchBox: false,
    /**
     * show addon panel as a vertical panel on the right
     * <strong i="12">@type</strong> {string}
     */
    addonPanelInRight: true,
    /**
     * sorts stories
     * <strong i="13">@type</strong> {Boolean}
     */
    sortStoriesByKind: false,
    /**
     * regex for finding the hierarchy separator
     * <strong i="14">@example</strong>:
     *   null - turn off hierarchy
     *   /\// - split by `/`
     *   /\./ - split by `.`
     *   /\/|\./ - split by `/` or `.`
     * <strong i="15">@type</strong> {Regex}
     */
    hierarchySeparator: null,
    /**
     * regex for finding the hierarchy root separator
     * <strong i="16">@example</strong>:
     *   null - turn off multiple hierarchy roots
     *   /\|/ - split by `|`
     * <strong i="17">@type</strong> {Regex}
     */
    hierarchyRootSeparator: null,
    /**
     * sidebar tree animations
     * <strong i="18">@type</strong> {Boolean}
     */
    sidebarAnimations: true,
    /**
     * id to select an addon panel
     * <strong i="19">@type</strong> {String}
     */
    selectedAddonPanel: undefined, // The order of addons in the "Addon panel" is the same as you import them in 'addons.js'. The first panel will be opened by default as you run Storybook
    /**
     * enable/disable shortcuts
     * <strong i="20">@type</strong> {Boolean}
     */
    enableShortcuts: true // true by default
  }
});

const req = require.context('../src/components', true, /story.tsx$/);
function loadStories() {
  req.keys().forEach(filename => req(filename));
}
configure(loadStories, module);
addDecorator(withA11y);
addDecorator(withKnobs);

// HMR interface
if (module.hot) {
  // Capture hot update
  module.hot.accept('sumai-frontend', () => {
    document.location.reload();
  });
}

ci-dessous est mon histoire.tsx

import { storiesOf } from "@storybook/polymer";
import { text } from "@storybook/addon-knobs";

storiesOf("Basic Components", module)
  .add("Modal", () => {
    const el = document.createElement("sumai-full-width-image");
    el.name = text('Name', 'Namey');
    return el;
  });

Système:

System:
    OS: Linux 5.0 Ubuntu 19.04 (Disco Dingo)
    CPU: (4) x64 Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz
  Binaries:
    Node: 10.15.3 - /usr/local/bin/node
    Yarn: 1.16.0 - /bin/yarn
    npm: 6.4.1 - /usr/local/bin/npm
  Browsers:
    Chrome: 75.0.3770.80
    Firefox: 69.0.2
  npmPackages:
    @storybook/addon-a11y: 5.2.3 => 5.2.3 
    @storybook/addon-actions: 5.2.3 => 5.2.3 
    @storybook/addon-knobs: 5.2.3 => 5.2.3 
    @storybook/addon-storysource: 5.2.3 => 5.2.3 
    @storybook/addon-viewport: 5.2.3 => 5.2.3 
    @storybook/addons: 5.2.3 => 5.2.3 
    @storybook/cli: 5.2.3 => 5.2.3 
    @storybook/html: 5.2.3 => 5.2.3 
    @storybook/polymer: 5.2.3 => 5.2.3

Contexte supplémentaire