nrf52840dk lvgl file system

hi,

I am using the nrf52840DK board to test the LVGL file system reading function.
SDK version:ncs V2.5.1

test code:
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/*
* Copyright (c) 2018 Jan Van Winkel <jan.van_winkel@dxplore.eu>
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/device.h>
#include <zephyr/kernel.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/display.h>
#include <zephyr/drivers/gpio.h>
#include <lvgl.h>
#include <stdio.h>
#include <string.h>
#include <zephyr/storage/disk_access.h>
#include <zephyr/fs/fs.h>
#include <ff.h>
////#include "../generated/gui_guider.h"
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
prj.conf:
CONFIG_MAIN_STACK_SIZE=20480
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=6000
CONFIG_HEAP_MEM_POOL_SIZE=32000
#CONFIG_LV_Z_MEM_POOL_HEAP_LIB_C=y
#CONFIG_LV_Z_MEM_POOL_SYS_HEAP=y
CONFIG_LV_Z_MEM_POOL_MIN_SIZE=4
CONFIG_LV_Z_MEM_POOL_MAX_SIZE=1024
CONFIG_LV_Z_MEM_POOL_NUMBER_BLOCKS=10
CONFIG_LV_IMG_CACHE_DEF_SIZE=1
CONFIG_LV_Z_POINTER_INPUT_MSGQ_COUNT=200

CONFIG_LV_COLOR_SCREEN_TRANSP=y



CONFIG_DISK_ACCESS=y
CONFIG_FILE_SYSTEM=y
CONFIG_FAT_FILESYSTEM_ELM=y
CONFIG_FS_FATFS_LFN=y


CONFIG_NORDIC_QSPI_NOR=y
# The mx25 erase page size
CONFIG_NORDIC_QSPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096
CONFIG_DISK_DRIVERS=y
CONFIG_DISK_DRIVER_FLASH=y
# There may be no files on internal SoC flash, so this Kconfig
# options has ben enabled to create some if listing does not
# find in the first place.
#CONFIG_FS_SAMPLE_CREATE_SOME_ENTRIES=y
 
error message:
Open OK
read: count:395
Open OK
read: count:396
Open OK
read: count:397
Open OK
read: count:398
Open OK
read: count:399
Open OK
read: count:400
Open fail:12Open fail:12Open fail:12Open fail:12Open fail:12Open fail:12Open fail:12Open fail:12Open fail:12Open fail:12