Why is my Zynq-7000 marine navigation system failing to initialize the NMEA 2000 GPS sensor?

#include <stdio.h>
#include <nmea2000.h>

int main() {
    NMEA2000 *nmea;
    nmea = nmea2000_init("/dev/ttyUSB0");

    if (nmea == NULL) {
        fprintf(stderr, "Failed to initialize NMEA 2000\n");
        return 1;
    }

    float latitude, longitude;
    if (nmea2000_get_gps(nmea, &latitude, &longitude) != 0) {
        fprintf(stderr, "Failed to read GPS data\n");
    } else {
        printf("Latitude: %f, Longitude: %f\n", latitude, longitude);
    }

    nmea2000_cleanup(nmea);
    return 0;
}