I've gone through all the steps in the manual to no avail. So, off to the YouTube video. Everything works until there's supposed to be a serial number appearing after a refresh of the USB configuration in the STM32CubeProgrammer application. No serial number appears nor does any port appear in the drop-down list. I've tried both the USB3 ports on the top & back of my case with the exact same results. I've tried multiple times in both instance in case I wasn't completely holding down the correct two buttons to get the device into bootloader mode.
What's next?