iOS Safari – Shows PDF Code instead of downloading the PDF

hey folks,

we are using the free version of your great plugin. At the moment we are experiencing issues while opening PDF documents on iOS Safari via the download manager.

Please have look at the attached screenshot. I have already disabled all other plugins and cleared the whole .htaccess file to sort out the most common issues. But the problem still exists. Can please have look on that?

Thanks

Kind regards
Pazekal

URL: https://www.ej-untermain.de/jugendleiterausbildung/
The first download button on top of the page shows the problem.