XnView Software

Hi,
sometimes I receive images as attachments (not embedded in the body) in Outlook/Emails. If double-click on them, the screen becomes white and I only can see the navigation buttons at the bottom (see attachment).

I have set XnViewMP Version 0.99.7 64bits (Jan 13 2022) to be the default app for almost all images formats.

How can I fix this please?

Double-clicking on an image in Outlook works fine for me on Windows 10. Perhaps a problem of access rights? But if this was an access problem XnView MP would display an error message "File not file" and not display an empty image. Perhaps someone else/Pierre has an idea.