After the last update, I'm not able to click any app from the menu of my phone. When I do click an app, I get the message "Menu not currently available".
It definitely has to be linked with the update. I am having the exact same issue and so are many other. The S21 range had the same issue post update in March!
Nah, it's almost certainly a user applied Theme, language setting or something like that.
But what are you doing when you get "Menu not Available", ie: Settings > Apps or??