Card initialization failed with exception

Hi all I am new bee into pysim and python too. I have successfully installed all dependenceis and my code start running. I was too delighted and connected my card reader and ran the following command $python4 pySim-read.py -p 0 and the responce is like below. qt5ct: using qt5ct plugin Using PC/SC reader interface Card reader initialization failed with exception: Exception was not showing any reason for failure but an empty string. Can someone please help me