Please help why is this not working

Question

I'm trying to upload an image to a folder but it's not working, Please why.
https://code.sololearn.com/W6PBM3w82tbw/?ref=app
https://code.sololearn.com/wGxNe9RFpJle/?ref=app

Answer 1

I'm not running it on sololearn

Answer 2

I'm using 000webhost to host it

Answer 3

I have