Error with FileUpload in Livewire nested component

FileUpload::make('pmva_2')->label('Certificate')->required()
            ->acceptedFileTypes(['application/pdf','image/jpeg','image/png'])
            ->disk('public')->directory('pmva_certs'),

<form>
    {{ $this->form }}
    @if($this->showCreateCheckout)
        <x-filament::button color="info" class="mt-2" wire:click="createCheckout">
            @if($this->training->course_id === 6) Request Booking @else Confirm Booking @endif
        </x-filament::button>
    @endif
</form>
<x-filament-actions::modals />