Select list item error after retrieving data from Firebase

[informatika (informatika diyan)]

[Gaston (zodiaclogic)]

Are you trying to extract an empty value

[Saezy (Farhad Stanekzay)]

You are using select list item block on a string. Please show the blocks for the action that is causing this error.

[informatika (informatika diyan)]

please help me… i have tried to fill in the empty string but its wrong

[Saezy (Farhad Stanekzay)]

You are setting your list to the value you receive from Firebase, the value is an empty string. Is there anything in your Firebase table?