**
Every time after I downloaded an app this window opens and never closes how to close it?**
I can't close this window
We appreciate your interest in participating in the forums! These forums are for questions about developing software and accessories for Apple platforms. Your question seems related to a consumer feature and is better suited for the Apple Support Communities
https://discussions.apple.com/welcome
My modest person suggestion is to restart the computer and to contact the author of that app "Notion" before you try to install it again.
Albert Pascual Worldwide Developer Relations.