According to your log, your setup seems completely off, i.e. Klipper and its dependencies not correctly installed.
Either follow the information provided here or here
For properly flashing the printer board, follow the information on top of klipper/config/printer-creality-ender3-s1-2021.cfg at master · Klipper3d/klipper · GitHub and the information in Issues flashing the printer board should issues occur. In particular, it is important to unmistakeably identify the MCU type of your board