Cannot display webItem with system.space.sidebar/main-links

I cannot get my webItem displayed at system.space.sidebar/main-links
Though I can add it to other locations like system.admin/marketplace_confluence and system.admin/configuration.

Any specific reason why it is not displayed under APPS ?

Here is code I’m using:

{
        "location": "system.space.sidebar/main-links",
        "weight": 200,
        "url": "/admin-app-config",
        "context": "page",
        "target": {
          "type": "page"
        },
        "name": {
          "value": "My App Configuration"
        },
        "key": "myapp-admin-app-space-sidebar-link"
      }

Thank you!

Dear Alex,

the screenshot you provided does not seem to match the location you indicated.

To insert a link under apps you would need an Admin page. Further details about the locations are here or you use the Extension Point Finder from Marketplace.

I hope that helps.

Andreas