error with buildroot image

[gurpartap]

I am folowing this guide to build image including Qt5 and mali drivers :
http://vanguardiasur.com.ar/opengl-es-on-allwinner-boards

but When I try to boot from Sd card I got below error:
Scanning mmc 0:1...
ext4fs_devread read outside partition 4751392
ext4fs_devread read outside partition 4751392
ext4fs_devread read outside partition 4751392
MMC: no card present

Please guide me if Somebody successfully deployed image with buildroot