Polsarpro Wrong Polar - type argument in config.txt

Hi All, I have a problem using polsarpro v.6.0 (bio), the problem is about “Wrong Polar - Type Argument in Config.txt, Fatal error - abnormal termination of polsarpro software”
The problem occur when I open the environment and setting the main input directory (single data set/Pol-SAR).
Btw, data has been process in SNAP v6 using polarimetric matrix generation C2 and saved to polsarpro, please help me, thank you very much in advance.