`tmkms keygen` command doesn't work about tmkms HOT 5 CLOSED

isysadmin@iblcoreus-sta-btc2:~/ATOM$ tmkms start -c tmkms.toml 
Mar 26 07:14:36.271  INFO tmkms::commands::start: tmkms 0.7.2 starting up...
Mar 26 07:14:36.271  INFO tmkms::keyring: [keyring:softsign] added consensus key cosmosvalconspub1zcjduepqkj4xhgzgrqk3e0gcd2q35a7jnwd7jj6c4ue9la8wcnrac5u689kq3j4sh2
Mar 26 07:14:36.271  INFO tmkms::connection::tcp: KMS node ID: 8E95C1DB663E5C0063FC6F89BB61FACDB92EBC3E
Mar 26 07:14:36.273  INFO tmkms::session: [cosmoshub-3@tcp://127.0.0.1:26658] connected to validator successfully

const WebSocket = require("ws");
let url = "tcp://127.0.0.1:26658"
let ws = new WebSocket(url);

ws.onopen = () => {
    console.log(`Websocket connection to ${url} successfully.`);
};

ws.onerror = (error) => {
    console.log(`Websocket connection to ${url} error: ${error.message}`);
};

ws.onclose = (error) => {
    console.log(`Websocket connection to ${url} closed: ${error.message}`);
};

ws.onconnecting = () => {
    console.log(`Reconnecting to ${url}`);
};

ws.onmessage = (message) => {
    console.log(message.data)
};