CCS/CC3220SF-LAUNCHXL: Unable to debug from CCS v 7

Tool/software: Code Composer Studio

Hello,

I'm unable to debug the CC3200SF-LAUNCHXL board from within the Code Composer Studio. I am trying out the AWS IoT FreeRTOS example. On clicking the debug button, the project builds successfully and then fails to connect to the target with the following error: 

Error connecting to the target:
(Error -1170 @ 0x0)
Unable to access the DAP. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK).
(Emulation package 7.0.48.0)

The uniflash utility seems to work (I can still flash some of the binaries that we had built during a TI event last week). Could this be because the existing binary on the board was signed using a demo certificate before it was flashed onto the board using Uniflash?

Thanks in advance!