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

[Ryan_Khatamipour]

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

[Taifun]

global all_slot is a list of button components

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

Taifun

[Ryan_Khatamipour]

thanks for the solution!