Soft WDT reset - NodeMCU 8266 (Arduino)

[HiWageesha]

My MCU 8266 the problem here is when I flashed it to nodeMCU WDT Soft Reset is happening:

This is the error message

20:24:13.289 -> ctx: cont
20:24:13.327 -> sp: 3ffffc90 end: 3fffffc0 offset: 0190
20:24:13.358 -> 3ffffe20: 00000000 00000001 3ffffee4 3ffee928
20:24:13.391 -> 3ffffe30: 0000000b 3ffee8f0 3ffefae0 40205c48
20:24:13.456 -> 3ffffe40: 3ffe8745 000001bb 3ffefae0 40206b70
20:24:13.522 -> 3ffffe50: 3ffe87fc 0000003b 3ffefae0 40206fa0
20:24:13.558 -> 3ffffe60: 0000003b 3ffee8f0 0000002e 40203540

**

### This is the Sorce cord

**

#include <ESP8266WiFi.h>
#include <FirebaseArduino.h>
#include <Servo.h>
Servo sev1;

#define FIREBASE_HOST " -----"// Firebase host
#define FIREBASE_AUTH "--" //Firebase Auth code
#define WIFI_SSID "--" //Enter your wifi Name
#define WIFI_PASSWORD "--"//Enter your password
int servo1 ;

void setup() {
Serial.begin(9600);
sev1.attach(D8);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
Serial.print("Connecting");
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}

Serial.println();
Serial.println("Connected.");
Serial.println(WiFi.localIP());
Firebase.begin(FIREBASE_HOST, FIREBASE_AUTH);
}

void loop() {
servo1 = Firebase.getInt("Sev1");
Serial.println(servo1);
sev1.write(servo1);
delay(10);
}