TM4C1294NCPDT: cJSON Implementation on FreeRTOS

Tool/software:

Hi,
    I am supposed to make a json packet fromat using cJSON on the FreeRTOS for the MCU - TM4C1294NCPDT. I used this git code https://github.com/DaveGamble/cJSON for the API definitions used for serializing and deseralizing the string. In my code unable to Parse the string. cJSON_Parse definfition been fetched from the cJSON.c file git link sourse. Here, My given string was validated by online https://dadroit.com/string-to-json/ 
      const char*jsonString = "{\"r-id\":\"354033090105688\",\"m-cat\":\"request\",\"req-type\":\"RR_ident\",\"tag\":\"7hk923mzxc5st\"}";