Why does "Internal server error" occur?

Question

API

When using https://vk.com/dev/messages.send to reply to a message, I get the following response. You can learn the parameters that I pass from it. What could be the problem?

{
    "error": {
        "error_code": 10,
        "error_msg": "Internal server error",
        "request_params": [{
            "key": "oauth",
            "value": "1"
        }, {
            "key": "method",
            "value": "messages.send"
        }, {
            "key": "chat_id",
            "value": "2071"
        }, {
            "key": "disable_mentions",
            "value": "0"
        }, {
            "key": "dont_parse_links",
            "value": "0"
        }, {
            "key": "intent",
            "value": "default"
        }, {
            "key": "random_id",
            "value": "0"
        }, {
            "key": "reply_to",
            "value": "3001"
        }, {
            "key": "v",
            "value": "5.126"
        }]
    }
}

Answer 1

If you believe the documentation ( https://vk.com/dev/errors ), then this is an internal server error