I installed Klipper with MainSail on a RP 3 for my Ender-3 S1 Pro with STM32F103 processor. It worked at first, now clipper cant connect to printer. I tried to roll back to original firmware Ender-3s1pro_hw24s1_301_V2.0.8.16F1_F103_LASER_FDM.bin, it wont flash. Did i brick my printer?