WiFi authenticated via LEAP but no internet connection

I just lost the ability to connect to my workplace secure WiFi. Previously I had logged on with credentials (which have not changed recently) and the laptop always connected right away-- "authenticated via LEAP", says the Network control panel. But, today no internet connection.

Meanwhile my iPhone continues to connect to the same network with the same credentials. Never had a problem using both until today.

What I tried: restart; disconnect and reconnect; renew DHCP lease; remove this network from the saved list and re-enter it.

Details: 11 inch MacBook Air mid 2012, 8 GB RAM, OS 10.9.5