I’m trying to implement authentication, I store JWT token in session and send it with every request and I use cookie-session. All worked fine on localhost, but when I deploy my app with vercel, the server can only receive an undefined req.session. The browser told me that my session don’t have sameSite attribute, so it sets to default value – lax. but apparently, I had already set that in my server.
This is the code of my express server:

app.use(
  cookieSession({
    name: "session",
    keys: ["somecookiesecretkey"],
    signed: false,
    maxAge: 24 * 60 * 60 * 1000,
    cookie: {
      sameSite: "None",
      secure: true,
    },
  })
);

And this is the warning that browser told me.
warning: sameSite is not set

I have tried to turn off third-party block in Chrome setting. I also tried to flat the cookie object:

app.use(
  cookieSession({
    name: "session",
    keys: ["somecookiesecretkey"],
    signed: false,
    maxAge: 24 * 60 * 60 * 1000,
    sameSite: "None",
    secure: true,
  })
);