Process finished with exit code 11 (C)

Hello, I have an issue were, after proving input for char ID[9] (any number), the program exits and writes in the console: "Process finished with exit code 11".

I have no idea what went wrong, I am pretty sure my code is fine.

void addStudentWithCredentials(struct StNode* head) {
    char fullName[60], ID[9];

    printf("Enter full name: ");
    fgets(fullName, 40, stdin);

    printf("Enter ID: ");
    scanf("%s", ID);

    struct Student* tempSt = malloc(sizeof(struct Student));
    struct StNode* newNode = calloc(1, sizeof(struct StNode));

    if(tempSt != NULL) {
        strcpy(tempSt->fullName, fullName);
        strcpy(tempSt->ID, ID);
        strcpy(tempSt->stCode, '00000');