Error Message Not Showing for Multiselect Menu Modal

I would like to display an error message in a modal similar to this example: https://api.slack.com/surfaces/modals/using#displaying_errors. Right now I’m using this code for a multiselect menu: https://slack.dev/bolt-python/concepts#view_submissions.

I do something like this:

client.views_open(
    view={
        "type": "modal",
        "callback_id": "view_1",
        "title": {
          "type": "plain_text",
          "text": "My App",
          "emoji": True
        },
        "submit": {
          "type": "plain_text",
          "text": "Submit",
          "emoji": True
        },
        "close": {
          "type": "plain_text",
          "text": "Cancel",
          "emoji": True
        },
        "blocks": [
          {
            "type": "section",
            "block_id": "block1",
            "text": {
              "type": "mrkdwn",
              "text": "*Select channel*"
            },
            "accessory": {
              "type": "multi_conversations_select",
              "placeholder": {
                "type": "plain_text",
                "text": "Select Channels",
                "emoji": True
              },
              "action_id": "multi_conversations_select-action"
            }
          }
        ]
    }
  )

Then later:

@slackApp.view("view_1")
def handle_submission(ack, body, client, view):
  errors = {}

  channels = view["state"]["values"]["block1"]["multi_conversations_select-action"]["selected_conversations"]
  if not channels:
    errors["block1"] = "Please Select a Channel"
  if len(errors) > 0:
    print(errors)
    ack(response_action="errors", errors=errors)
    return 

But no red error message shows up on my view saying “Please Select a Channel.” I have tried the same thing with a simple input text box (no drop down menu) with “type”: “plain_text_input” and the red error box does pop up. Is there something I’m missing here?

Another thing I’ve noticed: whenever I choose something from the select menu, I always have this little exclamation point next to the selection box (I assume this means something’s going wrong, I’m just not sure what). I don’t get any error messages and the submission is able to go through successfully though.

Thank you!

[seratch]

I don’t have anything that I can share at this moment.

[seratch]

@arnav13081994 No, it isn’t. The workaround that you are already doing is the only thing that I can suggest.