Can't get Ossia Score to work

Hi, I’m new here. Just discovered Score and it looks like it would be kind of useful to some of my work. But I’m having an issue I hope someone has a solution to. When I try to open it it just flickers rapidly between being the active foreground app and a background app. Makes my whole computer impossible to use, even if I try to use a different application Score keeps flicking momentarily to being a foreground app, then to background again. So I can’t type anything, use any keyboard shortcuts, or even click a menu. I get stuck in this loop when I can’t really do anything because as fast as I can click on anything, or use a shortcut (in any app that’s open) score is flicking forward and back making menus inaccessible, or meaning shortcuts end up being sent to the wrong program so I can’t even quit it.

Running MacBook M1 with MacOS 13.7 and I only just downloaded Score so that’s the latest version. Any help hugely appreciated.