Connection refused [tcp://127.0.0.1:6379] laravel 8

Question

I install Redis cach driver in laravel 8 project. After refresh I am getting this error Connection refused [tcp://127.0.0.1:6379]. I cant find out my problem. where is the problem. anyone can tell me.

i used this commend by the

composer require predis/predis

.env file : CACHE_DRIVER=redis

I used this command in the controller :

public function homeproductdisplay () {
     $data= Cache()->remember('Product', 60, function() { 
     return DB::table('Product')   
       ->select(array('Product_name','status','slug','regular_price','gallery_image'))
       ->where('status', '=', 'Instock')
       ->limit(30)
       ->get();
 });