Inviting Users to Slack Doesn't Work Anymore?

After filling in a QuestionScout form, I want to end-user to be invited to Slack.

But for some strange reason, I only see myself and a slackbot as users, despite the fact that Pabbly has already fetched the data from the form (user + email id)

Here's a loom! > https://www.loom.com/share/e9dbb40afc7a460eba5cccf1fa362f9a

The action you are using only allows you to add existing users in your Slack group to a channel, it does not invite external users (which I think you are trying to do).
There is a slack invite API command which used to be available for free groups, but they changed it to only being available for paid accounts a couple of years ago.

https://stackoverflow.com/a/61742187
https://api.slack.com/methods/admin.users.invite

ah, I see..... thanks for clarifying