Unable to add Web Section to admin_plugins_menu

Hi! I am working on a plugin for Jira Cloud. I want to add Web Section with Web Items in Jira settings -> Add-ons. I am adding this piece of code into atlassian-connect.json:

"modules": {
    "webSections": [
      {
        "location": "admin_plugins_menu",
        "name": {
            "value": "Web Section name"
        },
        "key": "plugin-settings-section"
      }
    ],
    "webItems": [
      {
        "key": "plugin-settings-link",
        "location": "plugin-settings-section",
        "name": {
            "value": "Web Item name"
        },
        "url": "/plugin-settings"
      }
    ],
...

I found this piece of code here: https://developer.atlassian.com/cloud/jira/platform/administration-ui-locations/

However, after installing the plugin Web Section does not appear.
I was only able to add Web Item to system.top.navigation.bar.

I am a site-admin for this Jira instance. However, I tried to add additional permissions thinking this might solve my issue - it did not.

I am doing it wrong?
Thank you for your help,
Rafał

@rstencel, per the example, the location of your Web Item should be admin_plugins_menu/plugin-settings-section.

@epehrson thank you very much.
I spent a lot of time on it, but did not notice I did not follow the example from https://developer.atlassian.com/cloud/jira/platform/administration-ui-locations