slack-invite-automation: Failed! missing_scope ERROR

Hi Folks, neat App,

I installed fine through downloading and executing the docker container.

Then I accessed with a browser and received the error: Failed! missing_scope in the browser.

I cannot access more than this as logs from the container: POST /invite 200 1110.118 ms - 624 GET /css/style.css 304 3.993 ms - - GET /images/bg.jpg 304 1.094 ms - -

In the Oauth & Permissions Page at /oauth? – which has changed since the manual was written – I added under User Token Scopes

admin.teams:write

But when I follow up by pressing Please reinstall your app for these changes to take effect … The page reports: This app can not be installed on this workspace. Apps with this feature are only available to Enterprise customers. We are on the Slack Standard Plan.

Do I have the wrong Oauth permissions option or id an Enterprise Grid a requirement for programatic inviting of Users

Thanks for your help and any advice.