SUMMARY

The "Install the stable version in an easy way" button on https://krusader.org/get-krusader/index.html does nothing when clicked. If I right-click on it and use "Open in new tab", it produces a window with the URL:
appstream://org.kde.krusader.desktop
but it is a blank window.

STEPS TO REPRODUCE
1. visit https://krusader.org/get-krusader/index.html
2. click on "Install the stable version in an easy way" button
3. OR right-click on it and use "Open in new tab"

OBSERVED RESULT
1) as per Step 2 above, nothing happens
2) as per Step 3 above, the new window has the URL appstream://org.kde.krusader.desktop but it is empty.

EXPECTED RESULT
Some sort of dialogue or webpage would appear, offering download options or an explanation of what is necessary to install to make download possible.

SOFTWARE/OS VERSIONS
System:
  Kernel: 6.8.0-51-generic arch: x86_64 bits: 64 compiler: gcc v: 13.3.0 clocksource: tsc
  Desktop: Cinnamon v: 6.2.9 tk: GTK v: 3.24.41 wm: Muffin v: 6.2.0 vt: 7 dm: LightDM v: 1.30.0
    Distro: Linux Mint 22 Wilma base: Ubuntu 24.04 noble

ADDITIONAL INFORMATION
According to Synaptic Package Manager, I have the following packages installed:
appstream 1.0.2-1build6 Software component metadata management
gir1.2-appstream01.0 1.0.2-1build6 Library to access AppStream metadata (introspection data)
libappstream5 1.0.2-1build6 Library to access AppStream services