Attempt to get item number 1 of a list of length 0: []”

i have a problem with gemini code i went to https://www.youtube.com/watch?v=BrZZ-V5GyiU&t=523s this video to make gemini response to the applaction when i press send it says “Select list item: Attempt to get item number 1 of a list of length 0: []” can anyone help

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