Why is won't background image work in my code

Question

Background image error
https://code.sololearn.com/WYfRrFQRwc86/?ref=app

Answer 1

https://www.sololearn.com/Discuss/2601981/?ref=app

Answer 2

it may helps u

https://code.sololearn.com/Wy3lrXNwGsgJ/?ref=app
https://code.sololearn.com/WT3661NHpV3B/?ref=app

Answer 3

Your device didn't really upload the image.
Sadly, I don't know how to do that.