Settings has stopped on Nokia 8

I bought a Nokia 8 two days back, and updated it to Android Oreo 8.0.0. No more updates are available. I have only installed some basic everyday apps such WhatsApp or Facebook. I'm able to change wallpapers from the gallery. However, if I go to Settings > Display > Wallpaper, an error pops up, saying "Settings has stopped; open app again". What can I do to correct this? Clearing cache+data for the Settings app and restarting phone did not solve it. Rebooting into safe mode also did not help. On repeated trials, I see a slightly different screen.