Load Data Of Xlsx File In Laravel

Question

I am Trying To Open A Xlsx File By Using Maatwebsite Excel But its showing error

"Call to undefined method Maatwebsite\Excel\Excel::load()"

This is my Code

$dir=storage_path('navs/');
        $a = scandir($dir);

        for($i=0;$i<count($a);$i++)
        {
            if($a[$i]!='.' && $a[$i]!='..')
            {

                $file = Excel::load('storage/navs/' . $a[$i])->first()->keys();
                print_r($file);
            }
        }

Please Help me out