Run time error is showing

I am facing a problem or runtime error when i start my app. It says runtime error attempt to revoke… Etc please help me

Can you show blocks please? Othervise nobody can help you

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And maybe too a full error message without points

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Yes i can show you. Which screen blocks u need to see

If error occurs while program strarting it means that problem is in the Screen1

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Are you sure that screen names are correct? İyou should know that it is case sensitive.
And second issue is that you havent used correct blocks for screen change.

This is happening with you

But to make you free from error we need to know the recipe/ingredients/taste that smashed at your face