Discover Store throws a generic "package failed to install" error

I'm using Kubuntu 25.04 and trying to install the v13 .deb from this website, but every time i attempt to install it, it just says "package failed to install" with no option to see any greater detail.

<img width="931" height="717" alt="Image" src="https://github.com/user-attachments/assets/7d7f3c92-a76b-4f44-8b49-b627d197bb54" />