Just wanted to check back in on this. Were you able to verify that the connections, voltages and SPI signals were all correct? I know that this worked before, but sometimes things can be accidentally changed. Could you measure the resistance between GND and the following pins: VDD, CS, SCLK, DIN, DOUT, DIO1, DIO2, DIO3, DIO4 and RST? That might yield some clues.
Best,
NevadaMark