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MMWAVEICBOOST: Flashing xwr68xx_ccsdebug.bin onto the MMWAVEICBOOST using Uniflash

Part Number: MMWAVEICBOOST
Other Parts Discussed in Thread: UNIFLASH

When I try to use Uniflash to flash the xwr68xx_ccsdebug.bin onto the board, it just hangs and doesn't do anything.

The little green light/dot in the corner that is next to Cortex_R4_0 is grey.

When I go to use the CLI tool generated from the Uniflash GUI, I get:

info: Cortex_R4_0: Initialization complete.
info: Cortex_R4_0: Flashing process starting...
info: Cortex_R4_0: Connecting to COM Port /dev/ttyACM0...
info: Cortex_R4_0: Reset connection to device
info: Cortex_R4_0: Set break signal
Opening COM port /dev/ttyACM0...: 1%

Error: Cortex_R4_0: Initial response from the device was not received. Please power cycle device before re-flashing.
Instance shutdown procedure activated...: 99%
error: Cortex_R4_0: Not able to connect to serial port. Recheck COM port selected and/or permissions.
Done.: 100%
info: Cortex_R4_0: Flashing instance clean-up initiated...
info: Cortex_R4_0: Instance deinitialized!
Failed: Image loading failed: Not able to connect to serial port. Recheck COM port selected and/or permissions.

I tried closing the port via the pyserial module, but it wouldn't do it for some reason. I serial.close() then checked serial.isOpen() and it came back true...

How can I fix this?