Problem solved. Uninstalled all drivers (and IDE's), reinstalled and now able to connect through the STM32CubeProgrammer! Overwhelming onboarding feeling starting to fade...

Cheers, voltage fixed by using the USB port connected to a power source - seeing 3.29V now. Also did a continuity check on all the wires soldered to the ST-LINK V3-MINIE, not pretty but those are good too. Still the 'no target' error however.One clue...

Very much appreciate the help! I *believe* the VCC (pin 10) on the V3NMINIE is now correctly connected to the STM32F103C8T6's 3.3V power supply and that the STM32CubeProgrammer settings are correct, i.e. 'Software Reset'. There is a slightly noticeab...

Also new to the STM32 world and getting a similar "No STM32 target found!" error in the STM32CubeProgrammer. My concern is that I haven't wired things up correctly to the STM32F103C6T6 from the STLINK-V3NMINIE. Am I correct in assuming that it's as s...