Error Liveview file upload - (ArgumentError) cannot consume uploaded files when entries are still in progress

I’m trying to upload a csv file, but I’m getting an error.
Has anyone ever experienced this?

** (ArgumentError) cannot consume uploaded files when entries are still in progress
    (phoenix_live_view 0.15.7) lib/phoenix_live_view/upload.ex:238: Phoenix.LiveView.Upload.consume_uploaded_entries/3
    (project 0.1.0) lib/project_web/live/priority_live/index.ex:155: ProjectWeb.PriorityLive.Index.handle_event/3
    (phoenix_live_view 0.15.7) lib/phoenix_live_view/channel.ex:342: anonymous fn/3 in Phoenix.LiveView.Channel.view_handle_event/3
    (telemetry 0.4.3) /project/deps/telemetry/src/telemetry.erl:272: :telemetry.span/3
    (phoenix_live_view 0.15.7) lib/phoenix_live_view/channel.ex:204: Phoenix.LiveView.Channel.handle_info/2
    (stdlib 3.14) gen_server.erl:689: :gen_server.try_dispatch/4
    (stdlib 3.14) gen_server.erl:765: :gen_server.handle_msg/6
    (stdlib 3.14) proc_lib.erl:226: :proc_lib.init_p_do_apply/3
Last message: %Phoenix.Socket.Message{event: "event", join_ref: "4", payload: %{"event" => "submit_csv", "type" => "form", "value" => ""}, ref: "7", topic: "lv:phx-FwDWuGQXK6ER0Svl"}
State: %{components: {%{1 => {ProjectWeb.PriorityLive.ImportMatrix, "import", %{flash: %{}, id: "import", import_table: nil, inner_block: #Function<18.48070371/2 in ProjectWeb.PriorityLive.Index.render/1>, myself: %Phoenix.LiveComponent.CID{cid: 1}, return_to: "/priority_matrix", title: "Importando tabelas", uploaded_files: [], uploads: %{__phoenix_refs_to_names__: %{"phx-FwDWuh5vIgrQhhxI" => :csv_file, "phx-FwDWvQn9RcDQhk1B" => :csv_file}, csv_file: #Phoenix.LiveView.UploadConfig<accept: ".csv,.png", auto_upload?: false, entries: [], errors: [], max_entries: 1, max_file_size: 8000000, name: :csv_file, progress_event: nil, ref: "phx-FwDWvQn9RcDQhk1B", ...>}}, %{changed: %{}, root_view: ProjectWeb.PriorityLive.Index}, {248814122670927342674281395791530970972, %{}}}}, %{ProjectWeb.PriorityLive.ImportMatrix => %{"import" => 1}}, 2}, join_ref: "4", serializer: Phoenix.Socket.V2.JSONSerializer, socket: #Phoenix.LiveView.Socket<assigns: %{all_consult: [...], changeset: #Ecto.Changeset<action: nil, changes: %{}, errors: [], data: #Project.Structure<>, valid?: true>, csv_file: nil, flash: %{}, import_table: "", live_action: :index, matrix: "", ...}, changed: %{}, endpoint: ProjectWeb.Endpoint, id: "phx-FwDWuGQXK6ER0Svl", parent_pid: nil, root_pid: #PID<0.3317.0>, router: ProjectWeb.Router, transport_pid: #PID<0.3314.0>, view: ProjectWeb.PriorityLive.Index, ...>, topic: "lv:phx-FwDWuGQXK6ER0Svl", upload_names: %{}, upload_pids: %{}}


              <button type="button" class="dropdown-item" phx-click="import_table" phx-target="#import">Importar</button>
              <%= live_component(CcmanagerWeb.PriorityLive.ImportMatrix, id: "import", title: "Importando tabelas") do %>
              <div class="content-wrapper" style="min-height: 10%;">
                <form id="upload-form" phx-submit="submit_csv" phx-change="validate-csv">
                  <%= live_file_input @uploads.csv_file %>
                  <button type="submit" class: "btn btn-primary">Upload</button>
                <p class="alert alert-info"><%= live_flash(@flash, :info) %></p>
                <p class="alert alert-danger"><%= live_flash(@flash, :error) %></p>
              <% end %>


  def mount(params, session, socket) do
    socket = 
        |> assign(:uploaded_files, [])
        |> allow_upload(:csv_file, accept: ~w(.csv .png), max_entries: 1, auto_upload: true)

    {:ok, assign(socket, all_consult: %{}, import_table: "", csv_file: nil)}

  def handle_event("submit_csv", _params, socket) do
      uploaded_files = consume_uploaded_entries(socket, :csv_file, fn %{path: path}, _entry ->
        dest = Path.join("priv/static/uploads", Path.basename(path))
        File.cp!(path, dest)
        Routes.static_path(socket, "/uploads/#{Path.basename(dest)}")
      {:noreply, update(socket, :uploaded_files, &(&1 ++ uploaded_files))}

  def handle_event("validate-csv", _params, socket) do
    {:noreply, socket}

It looks like the entry has not finished uploading when you attempt to consume it. If someone uploads a chunky file and submits the form immediately it may not have uploaded. You can always use something like entry.done? to check that the file has uploaded before calling the consume_uploade_entries/3.

(I know this is resurrecting an old post, I stumbled upon this during an adjacent search).