Delete button (database)

Hello people
I need some help from you.

I have an app, which I register in the database (firebase). And I created a button to delete specific data in the database.
Then I select the Tag I want to delete in (list viewer) and clicking delete will delete the selected item. So far so good.
But I want to create a notification, where if I “don’t” click or select any item, I get a notification saying, “no item selected”. Otherwise delete the selected item.

Below are the blocks and the error message you are giving:


Good morning guys!
Can you help me?

can u send your block detail in English language ?

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Basically what it is saying that you are not giving any tag to the clear tag function

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