ESP8266WebServer cookie save problem

Projects Programming
5

I removed the first "Set-Cookie" in the string as you can see in the code below:

// Function to set a cookie
void setCookie(const char* cookieName, const char* cookieValue, int days) {
  String cookieHeader = String(cookieName) + "=" + String(cookieValue);
  if (days > 0) {cookieHeader += ";expires=" + String(days * 24 * 60 * 60);     // Add expiration if days is greater than 0
  }
  server.sendHeader("Set-Cookie", cookieHeader);               // Send the cookie header to the client
  Serial.println("Set-Cookie " + cookieHeader);
}

And this is the print-screen result of the serial monitor:
image

but the getCookie returns a null and I cannot see any cookie on the smartphone either:

 // Function to get a cookie value by name
String getCookie(const char* cookieName) {
  String cookieValue = "";
  if (server.hasHeader("Cookie")) {                            // Check if the "Cookie" header is present in the request
    String cookies = server.header("Cookie");
    int start = cookies.indexOf(String(cookieName) + "=");     // Find the position of the cookie name in the header
    if (start != -1) {
      start += strlen(cookieName) + 1;                         // Move the start position to the beginning of the value
      int end = cookies.indexOf(';', start);                   // Find the position of the semicolon or the end of the header
      if (end == -1) {
        end = cookies.length();
      }
      cookieValue = cookies.substring(start, end);             // Extract the cookie value
      Serial.println("CookieValue " + cookieValue);
    }
  }
  return cookieValue;
}