Hi
I'm running into the same issue, this is the output i get from the serial
<\r><\n>
U-Boot SPL 2024.01-armbian (Feb 10 2024 - 01:33:08 +0000)<\r><\n>
DRAM: 2048 MiB<\r><\n>
Trying to boot from MMC2<\r><\n>
Card did not respond to voltage select! : -110<\r><\n>
spl: mmc init failed with error: -95<\r><\n>
SPL: failed to boot from all boot devices<\r><\n>
### ERROR ### Please RESET the board ###<\r><\n>
I got no idea what to search for in this case, also somehow my emmc is mmcblk2 instead of the mmcblk1 that it's refered to in every source i found so far