“can not find that URL”

Hi ,

I’ve come across this error with your plugin when I was using the shortcode in a post:

I can not find that URL. Please make sure the PDF exists.

The document size shouldn′t be a problem. It′s just 1,2 MB.

That′s where the PDF should be displayed: https://wp-test.blaukontor.de/speisekarte/

And here′s the URL of the PDF:
https://wp-test.blaukontor.de/wp-content/uploads/2017/12/speisekarte.pdf

So please tell me, what did I wrong??

The page I need help with: [log in to see the link]