Error running zingg on Docker: first_name does not exist in input CSV schema

Hello, I am running zingg on docker. I installed it using docker pull zingg/zingg:0.4.0 command. Then I ran zingg using docker run -v C:\zingg:/zingg -it zingg/zingg:0.4.0 bash command. I configured the config.json file on /zingg folder on the container. My input.csv and config.json files have the same schema as per the documentation. Now when I am running zingg.sh --phase findTrainingData --conf config.json, I am getting below error. Not sure where am I making a mistake. Can you please help? java.lang.IllegalArgumentException: first_name does not exist. Available: z_zid, recId, fname, lname, stNo, add1, add2, city, areacode, state, dob, ssn, z_zsource, z_z_zid, z_recId, z_fname, z_lname, z_stNo, z_add1, z_add2, z_city, z_areacode, z_state, z_dob, z_ssn, z_z_zsource Attaching the config.json file as well.