Why can't I change my avatar picture?

[ᴀsI ᴇs ᴇʟ Ғᴜᴛʙᴏʟ!🍌]

I'm on my laptop and it doesn't let me change Avatar picture when i click on profile and it takes you to the upload picture mine doesn't show that you can change it when i click on it says in a box i can either have no image or facebook link picture but when i'm in my desktop it does why?

[Riki]

Possibly a glitch or missing a step. This works.Yahoo no longer provides avatars however you can create one from other free sites see the links below.If you are on wireless you must wait until you are on a computer.
Choose either a cartoon or a photo avatar you had saved to your pc.
Create a personal avatar below not a moving or large one, right click and save it to your computer pc.
Check the first one to make a cartoon of your own photo.
http://kusocartoon.com/photo-to-cartoon.…
http://laughingsquid.com/faceyourmanga-c…
http://www.free-avatars.com/
http://freeavatarsonline.com/
Now, closely follow these directions from Yahoo . http://help.yahoo.com/kb/index?page=cont…
Close and reopen your browser or reboot. and your avatar should be showing If your avatar isn't showing try resizing it to make it smaller.