Unable to load the requested file: After marking as paid

Hi guys,

I’m currently setting up Invoiceplane for my small business.

I’m running v1.4.7 on Uberspace.de in a subfolder with https enabled.

PDFs render fine when they are not marked as paid however if i mark it as paid the PDF cannot be generated anymore.
The page displays:
An Error Was Encountered
Unable to load the requested file: invoice_templates/pdf/.php

What should I do about it?

You should set the correct template in the system settings.