The width of sections in angular gantt

Question

I'm not able to use gantt.section. You can see the picture below that the width of the section is zero, it seems that I miss some files. I imported in my html file :

<link rel="stylesheet" type="text/css" href="node_modules/angular-gantt/dist/angular-gantt.css" />
<link rel="stylesheet" type="text/css" href=node_modules/angular-gantt/dist/angular-gantt-plugins.css"/> <link rel="stylesheet" type="text/css" href="node_modules/angular-gantt/dist/angular-gantt-core.css" />
<link rel="stylesheet" type="text/css" href="node_modules/angular-ui-tree/dist/angular-ui-tree.min.css" />
<link rel="stylesheet" type="text/css" href="node_modules/angular-gantt/src/plugins/sections/sections.css" />

All the plugins that I use work fine except sections. data:

[
              {
                "name": "Create concept",
                "tasks": [
                  {
                    "name": "Create concept",
                    "priority": 20,
                    "content": "<i class=\"fa fa-cog\" ng-click=\"scope.handleTaskIconClick(task.model)\"></i> {{task.model.name}}",
                    "color": "#F1C232",
                    "from": moment(1568800800000),
                    "to": moment(1568808000000),
                    "progress": 100,
                    "sections": {
                      "items": [
                        {
                          "name": "Section #1",
                          "classes": [
                            "section-1"
                          ],
                          "from": moment(1568800800000),
                          "to": moment(1568811600000)
                        },
                        {
                          "name": "Section #2",
                          "classes": [
                            "section-2"
                          ],
                          "from": moment(1568811600000),
                          "to": moment(1568808000000)
                        }
                      ]
                    },
                    "id": "10c452b2-618b-f694-b0b6-b33ebfaac4fb"
                  }
                ],
                "id": "1477337d-0c9a-0174-2d08-b45befb0fe32"
              }
            ]

the html part :

<div class="row">
                            <div class="col-sm-12"
                                 gantt data="data"
                                 filter-row="{'name': ganttOptions.filterRow}"
                            >
                                <gantt-tree></gantt-tree>
                                <gantt-sections disable-magnet="true"></gantt-sections>// When I leave the default disable-magnet, I find in console an error says that Cannot read property 'getMagnetDate' of undefined
                                <gantt-dependencies enabled="true" read-only="true" js-plumb-defaults="jsPlumbDefaults" fallback-endpoints="fallbackEndpoints"></gantt-dependencies>
                            </div>