Assuming you are using ethernet or wifi the address of the roboRIO is still roboRIO-TEAM-FRC.local
Have you tried going to
http://roboRIO-876-FRC.local using internet explorer (chrome may not work as this site requires Microsoft Silverlight)?
Can the Driver Station connect from your programming computer? To do this all other Driver Stations connected to the robot network should be off.
If the Driver Station program connects to the roboRIO and you can see the Web Dashboard of the roboRIO using internet explorer, the below items will probably not help.
Have you tried disabling all your network connections except for the one you are using? By this I mean right clicking the network connections you are not using in control panel and selecting Disable.
Your computer should use an automatic IP address since 2015.
If you are connecting though the radio, the radio should be updated with this year's firmware and configured.
Try pressing the Reset button on the roboRIO to reboot it once everything else is on.