I have this code when displaying list of invoices, this is similar or maybe exactly the same to the ones in the official Laravel Cashier documentation. I am getting this weird DateTime::__construct(): Failed to parse time string (@) at position 0 (@): Unexpected character error and I'm not sure what's the @ character doing in replace of a supposed to be date.

@foreach (Auth::user()->invoices() as $invoice)
    <tr>
        <td>{{ $invoice->date()->toFormattedDateString() }}</td>
        <td>{{ $invoice->total() }}</td>
        <td>
            <a href="/user/invoice/{{ $invoice->id }}">Download</a>
        </td>
    </tr>
@endforeach

Does anyone have a similar experience? I have also tried to just var_dump each $invoice->date() in the controller but the error is still the same. The line $invoice->date()->toFormattedDateString() is causing the error because the invoice date is NULL. I followed the Laravel Cashier Stripe documentation but I am getting this error. When downloading invoices, the error is also the same because the invoice date is NULL.