Problem with the connection between htm and javascript

I am Very new in this field, i am actually trieng to build a anime quiz, but it seems harder than i thought.
I followed the tutorial from this guy
https://www.youtube.com/watch?v=zZdQGs62cR8&list=PLDlWc9AfQBfZIkdVaOQXi1tizJeNJipEx&index=4

But get stucked, because my html data doesnt connect with the Javascript data, which i created trough the Video.
Maybe someone can see, why it isnt works in my Code

here is the code from me in Github
https://github.com/Slimejoker/Dr-Stone-Quiz-professionell

hope everyone can see it, dont know why it is private. I am still learning, also about Github.
Pls help, the main problem is why my html data dont connecting. All the Files are in the same folder.