Enabling MMU and CACHES lead to "SDHC: Error: No Card Inserted"

[SimoneBongini]

Hello, I'm trying to enable MMU and CACHES in SAMA5D2-D1G based board but I got

AT91Bootstrap 4.0.6-dirty (2023-05-05 12:39:18)

SD/MMC: Image: Read file u-boot.bin to 0x23f00000 SDHC: Error: No Card Inserted *** FATFS: f_open, filename: [u-boot.bin]: error SD/MMC: Failed to load image

I let CONFIG_MMU_TABLE_BASE_ADDR = 0x20000000 as default. Any suggestions?