JavaScript "Can't read null"

Question

The JavaScript code says cant read null. can someone help me?
Name: Premier

Answer 1

Loopeee
You have to write JS code except other functions inside window.onload function
Because JS code execute before loading html contents.

Answer 2

Loopeee This code doesn't contains JavaScript code

Answer 3

Loopeee
Code?

Answer 4

Here A͢J : https://code.sololearn.com/W5W7I0ZaNu3j/?ref=app

Answer 5

A͢J sorry my bad

Answer 6

Is it okay now?

Answer 7

A͢J its from line: 11