AWR1843BOOST: mmWave studio SPI disconnected & UniFlash cannot connect to COM Port

Part Number: AWR1843BOOST
Other Parts Discussed in Thread: UNIFLASH

I am trying to experiment with the AWR1843BOOST Evaluation Module and the DCA1000 EVM Data Capture Card. I am strictly following the

https://www.ti.com/video/5827389052001

but I am having trouble with the SPI Connect(5) step.
When I click on SPI Connect, the console displays the following message: 

I tried to refer to

e2echina.ti.com/.../awr1843boost-mmw-demo

I tried to burn the MMV demo with reference to , but during the burning process, UniFlash displays the following error message. I made sure that my SOP configuration and the COM Port I selected are correct, i.e., 

The detailed configuration information is as follows:

How should this situation be debugged?