FirebaseJson is confilcted with json inside ESP8266WebServer library about firebase-esp8266 HOT 6 CLOSED

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>

#include <FirebaseESP8266.h>
#include "addons/TokenHelper.h"
#include "addons/RTDBHelper.h"

#define WIFI_SSID "WIFI_AP"
#define WIFI_PASSWORD "WIFI_PASSWORD"
#define API_KEY "API_KEY"
#define DATABASE_URL "URL"
#define USER_EMAIL "USER_EMAIL"
#define USER_PASSWORD "USER_PASSWORD"

FirebaseData fbdo;
FirebaseAuth auth;
FirebaseConfig config;

unsigned long dataMillis = 0;
int count = 0;

ESP8266WebServer server(80);

void setup() {

  Serial.begin(115200);

  WiFi.mode(WIFI_AP_STA);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

  Serial.print("Connecting to Wi-Fi");
  unsigned long ms = millis();
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(300);
  }
  Serial.println();
  Serial.print("Connected with IP: ");
  Serial.println(WiFi.localIP());
  Serial.println();

  Serial.printf("Firebase Client v%s\n\n", FIREBASE_CLIENT_VERSION);

  config.api_key = API_KEY;
  auth.user.email = USER_EMAIL;
  auth.user.password = USER_PASSWORD;
  config.database_url = DATABASE_URL;

  Firebase.reconnectNetwork(true);
  fbdo.setBSSLBufferSize(4096, 1024);
  config.token_status_callback = tokenStatusCallback;

  Firebase.begin(&config, &auth);

  server.on("/", []() {
    server.send(200, "text/html", "<p>It works!</p>");
  });

  server.begin();
}

void loop() {
  server.handleClient();

  if (millis() - dataMillis > 5000 && Firebase.ready()) {
    dataMillis = millis();

    count++;

    Serial.printf("Set bool... %s\n", Firebase.setBool(fbdo, F("/test/bool"), count % 2 == 0) ? "ok" : fbdo.errorReason().c_str());

    Serial.printf("Get bool... %s\n", Firebase.getBool(fbdo, FPSTR("/test/bool")) ? fbdo.to<bool>() ? "true" : "false" : fbdo.errorReason().c_str());
  }
}