Unable to guess the mime type as no guessers are available Laravel 5.2

PHP Snippet 1:

<?php

namespace App\Support\Enum;

enum ImageExtension: string {
    case Png = 'png';
    case Jpg = 'jpg';
    case Jpeg = 'jpeg';

    /**
     * Return all values as array
     *
     * @return array
     */
    public static function values()
    {
        return array_map(
            fn(ImageExtension $imageExtension) => $imageExtension->value,
            self::cases()
        );
    }
}

PHP Snippet 2:

['image', 'mimes:' . implode(',', ImageExtension::values()), 'max:10000'],