You can still get into your email, calendar and other google services you will just need to go directly to google.com. If prompted select Organizational account and you'll get access.
The issue is being looked into right now we'll update as we get more info.
As stated by Onelogin at https://www.onelogin.com/status:
- INCIDENT STATUS:Degraded Performance
- AFFECTED COMPONENTS:Portal
- AFFECTED LOCATIONS:US Operating Region