Nodemcu(ESP8266) can' send data to the firebase

The ESP8266 can't send any data to the firebase even when it's connected to the internet, the code is correct but I don't know what happened. NOTE: this code was working but after a while, it can't send any data. NOTE: the firebase HOST and AUTH are correct. NOTE: the fingerprint is updated to the newest fingerprint.

#include <Firebase.h>
#include <Adafruit_NeoPixel.h>
#include <DHT.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ESP8266WiFi.h>
#include <FirebaseArduino.h>


#define DHTTYPE DHT11  // DHT 11
const byte DHTPIN = 14;   // D1 Digital pin connected to the DHT sensor
LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT dht(DHTPIN, DHTTYPE);

#define FIREBASE_HOST "FIREBASE_HOST"
#define FIREBASE_AUTH "FIREBASE_AUTH"
#define WIFI_SSID "SHARM"
#define WIFI_PASSWORD "***********"

float temperature = 0;
float humidity = 0;
float GasValue = 0;

void PrintTemp()
{
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp is ");
  lcd.setCursor(9, 0);
  lcd.print(temperature);
  lcd.setCursor(0, 1);
  lcd.print("Humidity is ");
  lcd.setCursor(12, 1);
  lcd.print(humidity - 40
  );
  Serial.println(humidity);
  delay(100);
}
void setup()
{
  lcd.init();
  lcd.backlight();
  lcd.begin(16, 2);
  pinMode(DHTPIN, INPUT);
  Serial.begin(9600);
  dht.begin();

  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("connecting");
  while (WiFi.status() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(500);



  }
  Serial.println("IP : ");
  Serial.println(WiFi.localIP());

  Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);
  Serial.println(FIREBASE_AUTH);
}
void loop()
{
  Serial.println(GasValue);

  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  humidity = dht.readHumidity();
  Firebase.setFloat("Humidity", humidity - 40);
  // Read temperature as Celsius (the default)
  temperature = dht.readTemperature();
  Firebase.setInt("Temp", temperature);
  PrintTemp();
  GasValue = analogRead(A0);
  Serial.println(GasValue);


  if (GasValue > 300)
  {
    lcd.clear();
    lcd.setCursor(5, 0);
    lcd.print("Gas Leakage ");
    delay(1000);


    Firebase.setFloat("Gas", 1);
    PrintTemp();
    Serial.println("Gas Lekage");
  }
  else
  {
    delay(10);
    Firebase.setFloat("Gas", 0);
    lcd.clear();
    PrintTemp();
  }
}