I have a Microsoft Dataverse (legacy) > Custom Action setup

It has a user input section

but when i click to run it nothing comes up

There are additional steps within the flow.
I am a Power Platform Admin.
I am in a different environment than the "Default" so I have tried changing the environment drop down to something else but it only has default and custom, I have tried filling it in with the other environment GUID but that didn't work either.
Any recommendations?