When attempting to setup or change the Pixel Wallpapers, you may receive this message: App isn’t installed. This article will show you how to fix it.
A. Make sure the Wallpapers is enabled.
1. Tap Settings.
2. Tap Apps & Notifications.
3. Tap See all ## apps
4. Tap Menu (3 dots) and then Show system.
5. Find the Wallpapers, Pixel Wallpapers 18 in our example. If it is disabled, tap on it.
6. Tap Enable. Now, test it and make Wallpapers works. If not, continue B.
B. Reset apps
Repeat 1 to 3 in A. In step 4, tap Reset app preferences.
5. Tap Reset apps in the popup.
Now, Wallpapers should work!
Please view this step by step video: