IWRL6432: No date on com port detected, read time out

I had the IWRL6432BOOST working perfectly with the Level Sensing demo in the Industrial Visualizer. But then I tried flashing the image to the IWRL6432BOOST through Uniflash and was experiencing a weird error that I fixed by typing in the device name instead using the pop up on Uniflash. Once I was able successfully to flash the IWRL6432BOOST I followed the instructions given in the Level Sensing demo user guide. Yet, once I started the demo, it gave me the error "No data on com port detected, read time out" and said I need to make sure the board is in the right mode (Functional mode) and make sure the config file is correct. The board was in the right mode, but I had messed with the config file before, even though the visualizer has worked with it before. So I uninstalled and reinstalled the radar toolbox and MMWAVE SDK so I'd have the original files. When I followed the steps for the level sensing demo again with the unaltered files I still got the same error message. 

Another message that did pop up before the "No data on com port detected, read time out" was stuff about no valid ATE calibration. I will be able to post pictures to give more context later, but is there any initial idea as to what went wrong?