Slack interaction set up

Hey folks, I’m really new to using APIs - I’ve successfully set up the Bubble Slack app so that Bubble can pull data from a Slack workspace, but I’m now trying to create a slack interaction so someone can trigger an action via a dropdown message on a slack thread.

I’ve created the app in Slack, that I know works for the other stuff I’m doing. I created an interaction with these settings:

Then in Bubble created an endpoint with these settings:

I’ve played around a whole bunch, but still can’t get it to trigger recognising when someone clicks the dropdown in Slack (appears like this when you click a thread)

Halp :frowning: