Why is my wallpaper not changing?

[Android Central Question]

I'm using an s9 phone. When I updated my phone, my wallpaper suddenly changed to a pure purple color. Like the wallpaper is just purple on my home screen. I am successful in changing my lock screen pic but I can't seem to change my home screen. I changed my wallpaper for home screen to a pic from my gallery and it said that the pic is successfully applied but the home screen does not show the pic. Only the purple color. It's like the purple is covering my wallpaper cause when I open my wallpaper from holding an empty space on screen, I can see my pic on my home screen but every time when I go back I'll only see the purple wallpaper. Does anyone know what is wrong?

 

[lucianus_luciferus]

try changing the theme to the default one.

 

[krisqz]

Pie broke support for some themes. Try changing to default.