Get into your SSO account and click on the Canvas icon.  It will open without asking you to login.  You should see items in your dashboard.  When no items are display, it usually means it is a browser issue.

Canvas works best with the Chrome browser.  If you do no use Chrome, consider downloading it, even if the sole purpose is to run Canvas.  

Other browser tips:  

1. Make sure you are on the latest version of your browser.

2. Restart your computer if it hasn't been restarted in more that a day.

3. Clear cache.