The document preview in Picturepark (Thumbnails, preview, presentation mode) shows weird characters. I cannot read the text.
Picturepark must know the font to render it correctly. You can solve the problem by changing the font.
In PowerPoint > Open Master > change font to a common font (e.g. Calibri, Arial, Roboto)
In Word > change font
In Excel > change font
If your Corporate Design requires a specific font that does not work in Picturepark, pls consult with your Picturepark representative or support team: firstname.lastname@example.org