Unreproducible

Changing profile doesn't work

What did you try to do?
Change the profile picture to the Mexico circuit.

What happened instead?
It doesn't work.

Did the problem happen while using wi-fi, mobile data, or both?
Wi-fi

Did the bug happen in the app, on PC, or both?
App

What is the model of your device?
Galaxy S8+ (SM-G955U)

What is the operating system?
Android

What is the version number of the operating system?
9, Pie

Can the bug be reproduced?
Every time I try, doesn't go and change it.

Additional comments:
I an using a different device.

Seems unreproducible now.

Are you trying to upload the track layout or the track pic that shows up on the "Home" tab for the next race?

Either way, I think the problem can be the image proportion (one is 520x310, and the other 500x310) as they are quite wide and the profile picture shown is squared in the standings.
Test a different picture with a more squared or vertical proportion (mine is 430x640 and it worked, so you can even try with this Mexico picture, just rotated 90°) and the same file types (.png and .jpg) to see if it will upload. If not, then it might be a bug ?