Waffle with LiveView

I’m trying to use waffle to handle the upload with LiveView uploads and receive the following error: [error] {:error, :invalid_file_path}.

I’m building a %Plug.Upload{content_type: content_type, filename: filename, path: path} struct which is then sent over as the “image” attribute to my schema that has my Waffle uploader type for field image. But in the cast_attachments function it returns the error changeset:

#Ecto.Changeset<
  action: nil,
  changes: %{title: "foo"},
  errors: [
    image: {"is invalid",
     [type: MyAppWeb.Uploaders.PostImage.Type, validation: :cast]}
  ],
  data: #MyApp.Blog.Post<>,
  valid?: false
>

The attributes being passed to the schema changeset are:

%{
  "title" => "foo",
  "image" => %Plug.Upload{
    content_type: "image/png",
    filename: "blog-title.png",
    path: "/var/folders/mt/9c2zqzy93tg5xfl7317j7m340000gn/T//plug-1619/live_view_upload-1619366353-634670199203471-4"
  }
}

I have tried without the LiveView and it works, but only difference I can see is in the path set on the upload.