With our 22.0 release series we also changed the slideshow from a static one to a dynamic one.
https://twitter.com/ManjaroLinux/status/1563862597396471810
On older hardware the used technology might not work and therefore the installer Calamares crashes, leaving the user baffled what just happened. You may use the older release from last year and update your system right after. Manjaro is after all a rolling release and only needs to been installed once. We may work on a solution so newer install medias might work with older hardware again.