Property setter was expecting a com.google.appinventor.components.button component but got a YailList instead error

i was testing my tic tac toe game but this error came in
here are the codes of blocks


please tell me what's wrong

global all_slot is a list of button components
unknown

the advanced block however is expecting a button component and not a list of button components

Taifun

1 Like

thanks for the solution!

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