Hello Alfin,
thanks for your report. Have you connected all input pins of the flash chip to the programmer? The behavior shown in the log extract could be coming from a floating write protection pin. That's pin #9 (diagonally opposite to the pin #1 marker on the 16-pin sop/soic package). I'd check if that pin is pulled-high towards VCC (pin #2). Likewise all other *input* pins should be driven - either statically to GND or VCC (ideally by resistors), or dynamically by the programmer's clock and data out pins. HTH