Welcome @younginpark, to the community!
the pull resistor at BOOT0 have to be connected to GND instead of VDD.
BTW: the pull-up at NRST is not necessary, see the description of NRST in the respective reference manual.
Hope that helps?
I tried connecting BOOT0 to nothing or connecting it to GND.
NRST(R8) is not connected to anything other than a pull-up resistor.
Still not working. Do you know why?
Boot1 is currently in a null state with nothing connected.