Why is there a "want to open" popup before each app?
The "Blank wants to open [app]?" prompt is a one-time iOS system dialog, not something from Blank Spaces.
The first time you open an app through a Blank Spaces widget, you may see a popup that says "Blank want to open [app]?"with an option to Allow or Cancel. This is a standard iOS security prompt from Apple.
How to dismiss it
Tap Allow. You only need to do this once per app. After that, the app will open directly without the popup appearing again.