Spatie Media Library on a custom page

<?php

namespace App\Filament\Admin\Resources\CertificateResource\Pages;

use App\Filament\Admin\Resources\CertificateResource;
use App\Models\Certificate;
use Filament\Forms\Components\Section;
use Filament\Forms\Components\SpatieMediaLibraryFileUpload;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Concerns\InteractsWithForms;
use Filament\Forms\Contracts\HasForms;
use Filament\Forms\Form;
use Filament\Notifications\Notification;
use Filament\Resources\Pages\Page;

class UploadCertificate extends Page implements HasForms
{
    use InteractsWithForms;

    public Certificate $record;

    public array $data = [];

    protected static string $resource = CertificateResource::class;

    protected static string $view = 'filament.admin.resources.certificate-resource.pages.upload-certificate';

    public function mount(Certificate $record): void
    {
        $this->record = $record;

        $record->load(['device','media']);

        $this->form->fill([
            'serial_number' => $record->serial_number,
            'device_id'     => $record->device->ecu_number,
            'certificate'   => $record->getMedia(),
        ]);
    }

    public function form(Form $form): Form
    {
        return $form->schema([
            Section::make('Certificate Copy')
                ->schema([
                    SpatieMediaLibraryFileUpload::make('media')
                        ->label('Upload Scanned Certificate'),
                ]),
        ])->statePath('data')
            ->model($this->record);
    }

    public function submit(): void
    {
       
    }
}

<?php

namespace App\Filament\Admin\Resources\CertificateResource\Pages;

use App\Filament\Admin\Resources\CertificateResource;
use App\Models\Certificate;
use Filament\Forms\Components\Section;
use Filament\Forms\Components\SpatieMediaLibraryFileUpload;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Concerns\InteractsWithForms;
use Filament\Forms\Contracts\HasForms;
use Filament\Forms\Form;
use Filament\Notifications\Notification;
use Filament\Resources\Pages\Page;

class UploadCertificate extends Page implements HasForms
{
    use InteractsWithForms;

    public Certificate $record;

    public array $data = [];

    protected static string $resource = CertificateResource::class;

    protected static string $view = 'filament.admin.resources.certificate-resource.pages.upload-certificate';

    public function mount(Certificate $record): void
    {
        $this->record = $record;

        $record->load(['device','media']);

        $this->form->fill([
            'serial_number' => $record->serial_number,
            'device_id'     => $record->device->ecu_number,
            'certificate'   => $record->getMedia(),
        ]);
    }

    public function form(Form $form): Form
    {
        return $form->schema([
            Section::make('Certificate Copy')
                ->schema([
                    SpatieMediaLibraryFileUpload::make('media')
                        ->label('Upload Scanned Certificate'),
                ]),
        ])->statePath('data')
            ->model($this->record);
    }

    public function submit(): void
    {
       
    }
}