Can’t see app images when image caching is turned on

Hello Marcel, I think this should be and issue specific to our server settings, but I hope you can help me or give me a hint what to change. When I turn on image caching for apps (icon, screenshots, QR…), cached images are saved correctly on our server in /wp-content/cache/wp-appbox/appID/screenshoID (but without file extension like JPG).

But our server can’t render these images, if they don’t have any extension (file.jpg instead of file). And result of this is than images aren’t shown on the web. Do you have any tip what to change on our server settings to make this work? Thank you ??