无法在松弛视图上显示错误

Question

我要在Slack斜杠命令之后发送此有效负载，并希望根据此Slack手册（https://api.slack.com/surfaces/modals/using#displaying_errors）测试错误响应

我正在发送并在屏幕上显示的有效载荷：

{
"type": "modal",
"submit": {
    "type": "plain_text",
    "text": "Submit",
    "emoji": true
},
"close": {
    "type": "plain_text",
    "text": "Cancel",
    "emoji": true
},
"title": {
    "type": "plain_text",
    "text": "Workplace check-in",
    "emoji": true
},
"blocks": [
    {
        "type": "input",
        "label": {
            "type": "plain_text",
            "text": "Anything else you want to tell us?",
            "emoji": true
        },
        "element": {
            "type": "plain_text_input",
            "multiline": true
        },
        "optional": true
    },
    {
        "type": "input",
        "label": {
            "type": "plain_text",
            "text": "What can we do to improve your experience working here?",
            "emoji": true
        },
        "element": {
            "type": "plain_text_input",
            "multiline": true
        }
    },
    {
        "type": "input",
        "label": {
            "type": "plain_text",
            "text": "What do you want for our team weekly lunch?",
            "emoji": true
        },
        "element": {
            "type": "multi_static_select",
            "placeholder": {
                "type": "plain_text",
                "text": "Select your favorites",
                "emoji": true
            },
            "options": [
                {
                    "text": {
                        "type": "plain_text",
                        "text": ":pizza: Pizza",
                        "emoji": true
                    },
                    "value": "value-0"
                },
                {
                    "text": {
                        "type": "plain_text",
                        "text": ":fried_shrimp: Thai food",
                        "emoji": true
                    },
                    "value": "value-1"
                },
                {
                    "text": {
                        "type": "plain_text",
                        "text": ":desert_island: Hawaiian",
                        "emoji": true
                    },
                    "value": "value-2"
                }
            ]
        }
    }
]

}

代码应使用Flask处理错误的请求：

if mytype == 'view_submission':
    return jsonify ({"response_action": "errors","errors": {"lunch": "You didn't select the right lunch"}}),200

但是，我只是从Slack那里得到答案，说：

我们在连接时遇到了一些麻烦。再试一次？

我对Slack的回复我做错了什么？