Facing error in notifier component

Guys can anyone tell me why this problem is happening? Please check 2nd and 4th picture

Make sure you have set arrangement to visible from designer.

I kept in unvisible. I want to keep arrangement visible only when internet gets disconnected or someone tries to open app without internet. So i cant keep visible in designer

Make it custom dialog on screen initialize so you do not have to make it visible and invisible again. It will be automatically invisible.And when you want to show it just show dialog.

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I tried your method but dailogue isnt showing. But i will try again. Lets see what happens