Hello,
I rarely use any micro controllers other than RP2040s w/ QMK since I have never had any issues getting keyboards up and running, but I'm trying with an ATMega32U4 controller (pro micro/arduino leonardo) this time.
The pro micro shows up in QMK toolbox, AVRDudess, arduino IDE, and QMK MSYS but none of them are able to flash a hex file to it. I haven't been able to find a lot of posts discussing this issue so maybe this can help others out as well, but has anyone had this problem before and been able to solve it?
I've tried different USB ports, different cables, and different pro micros, they all give the same error. Here is my output when attempting to flash thru MSYS:

u/BeefChiefBoy — 7 days ago