Google Chrome (Cookies and Trusted Sites):
Open your browser's cookie settings by typing chrome://settings/content/cookies in the address bar.
Check to make sure the following settings are as follows: Allow sites to save and read cookie data (On), Block third-party cookies (Off), c) Block - No sites added (none).
Internet Explorer (Cookies and Trusted Sites)
Go to Tools → Internet Options
Go to Privacy tab and make sure all first and third-party cookies are enabled.
Go to Security Tab → Trusted Sites and confirm Rocketrip and Concur are listed as trusted sites.
If that still did not do the trick, please check to see that there are no other third-party extensions that might be interfering with the Rocketrip extension. Ad-blockers are known to have this effect, as well as Ghostery.