The Invoice Archive (Settings -> Invoice Archive) is broken in 1.6.2

Expected Behavior

When I got to "Settings", click on "Invoice Archive" and open an existing pdf, the pdf should be shown/downloaded.

Current Behavior

After clicking on an invoice, the application gives back a 404.

Screenshots

Steps to Reproduce

1. Go to Settings
2. Click on "Invoice Archive"
3. Click on one of the invoices

Context (Environment)

Old invoices can't be accessed anymore

This bug is already confirmed by @AeroBytesNL