Clay likely isn't down, but you might be experiencing a session issue. Try these troubleshooting steps:
1. Perform a hard refresh in your browser:
• Mac: Press Cmd+Shift+R (Chrome/Firefox) or Cmd+Option+R (Safari)
• PC: Press Ctrl+F5
2. Try using an incognito window
3. Clear your browser cache
Since you mentioned logging in via Google, make sure you're using the same authentication method you originally signed up with.