Server action isn't appearing in Server Actions folder/dialog

I’ve created a form (in a modal) to gather information that I then want to have emailed. I’ve followed nearly all the instructions in this tutorial, up to the point where the behavior in the tutorial doesn’t match what’s happening in my project.

When I get to the instruction that reads Change the handler to DMXzone Server Connect: that’s where I’m getting tripped up. There’s no handler in recent versions (tutorial has great info, but important steps I can’t get completed are out of date), and it’s unclear whether I have to do something else to enable “connecting” to the DMXzone Server (or whatever it might be called now).

I’ve created and saved the Server Action:

I navigate to the form that has the input, in App Structure, but when I click the Select Server Action button I get a dialog with a folder inside called Server Actions and there aren’t any Server Actions to choose from.

I’ve saved the Server Action, and it reports it’s saved successfully. If I click / double-click / try to select that folder, it gives me nothing (tells me to select a Server Action, not a folder, which I would definitely like to do). Searching in that dialog produces nothing. It’s like it’s not connected to anything, or it can’t find the Server Action I already created and saved.

Any suggestions? I suspect I’m just missing some step to make it all connect, but I’ve been working on this for half a day, and I’m getting nowhere. Any help or guidance would be greatly appreciated!

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