Alpine Expression Error: fileUploadFormComponent when loading page first time

class PdfToExcel extends Component implements HasForms
{
    use InteractsWithForms;
    public ?array $data = [];
 
    public function mount(): void
    {
        $this->form->fill();
    }
 
    public function form(Form $form): Form
    {
        return $form
            ->schema([
                FileUpload::make('file')
                    ->label(__('Choose File'))
                    ->acceptedFileTypes(['application/pdf'])
                    ->storeFiles(false)
                    ->required(),
            ])->statePath('data');
    }
}

<div>
    <form wire:submit="send" class="default-form import min-w-96">
        {{ $this->form }}
       
        <button type="submit" class="button primary mt-3">
            {{ ucfirst(__('submit')) }}
        </button>
    </form>
   
    <x-filament-actions::modals />
    @livewire('notifications')
</div>