USBBURN how to? Error: make: web/execute_reflash: Command not found

make: web/execute_reflash: Command not found

Hello! I just got the espusb to work on my WSL (was a funny ride...)

I want to also use the usbburn. What can I do to fix this error?
make: web/execute_reflash: Command not found

Also, don't I have to also flash a bootloader? Can someone please give me some instructions on how to do all of this?
Thank you very much!