I have the same issue on my Windows 11 laptop, the app loads, says checking for updates then just disappears from the screen, no error message or anything.
My desktop PC also running Windows 11 works fine, although I opted for the beta version of the app, on my laptop it was the stable version. Unfortunately without the app loading, I cannot get into the settings to change to the beta version so I am stuck. Very annoying with the darts, football and F1 on over the next few days.