No content in invoices after update

I have just updated my Invoice Ninja to the version of, it seems like working fine on the interface and the listing of the invoices are correct too, but after I click to any of the invoices to view the content, I found that I see nothing from the invoices, but on the listing i still can see the name of my clients and the payment too. May I know why and how could I fix it?

Hopefully can get the helping hand at here. Thank you very much.

I have resolved the issue after I copied the old backup files into the folder and later copy the entire new files again to the folder. I think it happened because of new version have the ‘folder’ or file name as index.php.

Thank you.

Thanks for the update!