TypeError: Cannot read properties of undefined (reading 'length')

#1

hình ảnh_2023-03-15_212715839
hình ảnh_2023-03-15_2127158391332×632 36 KB

#2

What did you do to get that error?
It looks like someone else got the same error.

#3

I don’t know, I’m just following tutorial youtube https://www.youtube.com/watch?v=hhkWQPorBKQ&t=134s