"Google keeps stopping" after Android Oreo update

I got a Nexus 6P and it received the Oreo update yesterday. After installing the update, there were few errors like "Gboard stopped working" etc., That happened only once and the device was working normally for few hours. Now suddenly, I keep getting "Google keeps stopping" in the launcher screen. When I close the popup, the launcher is reloaded and the popup appears again immediately. Phone is currently kind of unusable. Tried to open Settings, but that got closed as well. Tried checking Play Store for the latest updates, but got none. Anyone else got this issue? Any idea if this can be resolved?