When connected to Concord Wi-Fi, (cusecure/CUPUBLIC) if you are having issues accessing the internet, try clearing your wireless network settings, or "Forgetting the Network".

In Windows: Go to Settings > Network & Internet > Wi-Fi > "Manage Known Networks" >  Select cusecure & CUPUBLIC > then click "Forget" for both of them.

Afterwards, go to the Wi-Fi icon in the bottom right corner   (by the clock) & connect to either CUPUBLIC or cusecure.