UserAgent: Mozilla/5.0 (X11; CrOS x86_64 9765.76.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.113 Safari/537.36

Steps to reproduce the problem:
1. wallpaper on my sign in screen is blurry
2. 
3. 

What is the expected behavior?

What went wrong?
when i open my chrome book my wallpaper screen is blurry i can sign in ok but lose the wallpaper untill i sign out

Did this work before? N/A 

Chrome version: 61.0.3163.113  Channel: n/a
OS Version: 9765.76.0
Flash Version: