Make sure to put the commands at very top of the paogram as follows:
#define BLYNK_TEMPLATE_ID "xxxxxxx"
#define BLYNK_TEMPLATE_NAME "xxxxxxx"
and before the commands of #include
#include <WiFi.h>
#include <Blynk.h>
#include <BlynkSimpleEsp32.h>
to be like this order
#define BLYNK_TEMPLATE_ID "xxxxxxx"
#define BLYNK_TEMPLATE_NAME "xxxxxxx"
#include <WiFi.h>
#include <Blynk.h>
#include <BlynkSimpleEsp32.h>
and everything will be fine : ) : )