When using Maatwebsite\Excel in laravel project getting Could not open file "" for writing error

I want to generate an excel sheet with custom array in laraval. So I have used "Maatwebsite\Excel" package.
Below is my export function,

public function export(){
    $users = [
        [
            'id' => 1,
            'name' => 'Hardik',
            'email' => 'hardik@gmail.com'
        ],
        [
            'id' => 2,
            'name' => 'Vimal',
            'email' => 'vimal@gmail.com'
        ],
        [
            'id' => 3,
            'name' => 'Harshad',
            'email' => 'harshad@gmail.com'
        ]
    ];
      
    return Excel::download(new RequestExport($users), 'users.xlsx');
}

Here is my RequestExport class,

<?php

namespace App\Exports;

use Maatwebsite\Excel\Concerns\FromCollection;

class RequestExport implements FromCollection
{
    protected $data;
  
    /**
     * Write code on Method
     *
     * @return response()
     */
    public function __construct($data)
    {
        $this->data = $data;
    }
  
    /**
     * Write code on Method
     *
     * @return response()
     */
    public function collection()
    {
        return collect($this->data);
    }
  
    /**
     * Write code on Method
     *
     * @return response()
     */
    public function headings() :array
    {
        return [
            'ID',
            'Name',
            'Email',
        ];
    }
}

When calling the export function always getting this error,

Someone please help me to solve this.

>Solution :

Try with clearing cache by php artisan optimize:clear and php artisan config:cache

Also you can recheck you have import Excel:class in files.