fw_printenv not working

[FinistSeb]

Hello,

I'm trying to use fw_printenv on A64 but I got only

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Warning: Bad CRC, using default environment

The u-boot env is saved

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sunxi#saveenv
Saving Environment to FAT...
[mmc]: Has init
[     10.813]---drivers/mmc/mmc.c 2733 mmc_init
writing uboot.env
done

/etc/fw_env.config exists with this values

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/dev/mmcblk1 0x953000 0xF0000

But I still have the warning.
As offset address I took 19096 * 512
As length 0xF0000 -> 983040 oct.  12 14:54 u-boot-sun50iw1p1-secure-with-teres-dtb.bin

Thanks in advance for any info!
Sébastien