Why in v4 if there is no return data field it causes an onError to trigger

[masterbater]

API Doesnt return always a data field why in @tanstack/react-query it causes this issue

 const {
    isLoading: isLoadingCheckConflictDuration,
    data: dataCheckConflictDuration,
    error: errorCheckConflictDurations,
    isSuccess,
    isError,
  } = useQuery(
    [`check-confict`, calculateEndDate, weeks, startDate],
    () => {
      const course_start = moment(startDate).format('YYYY-MM-DD')
      const course_end = calculateEndDate
      return getCheckConflictDuration({student_id, course_start, course_end, excludeIds: courseIds})
    },
    {
      enabled: !!calculateEndDate && !!weeks && !!student_id && !!startDate,
      retry: false,
      onError: (error) => toast.error(`${error?.response?.data.message}`, {id: 'errorAddCourse'}),
      // onSuccess: () =>
      //   toast.success(`Course Duration is free, you can proceed to add`, {id: 'successAddCourse'}),
    }
  )

[masterbater]

#4964 (comment)

NVM I found the issue and solution