Lora-e5 mini , I cannot not erase, write or change OB to the flash ? Whereas I removed RDP from 0xBB level 1 to 0xAA level 0

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Any updates about this? I’m facing the same problem with a custom board. I have configured rdp to 0xaa but at flash time I get this error:

Memory Programming ...
Opening and parsing file: ST-LINK_GDB_server_es3Vq7.srec
  File          : ST-LINK_GDB_server_es3Vq7.srec
  Size          : 113.66 KB 
  Address       : 0x08000000 


Erasing memory corresponding to segment 0:
Erasing internal memory sectors [0 56]
Error: failed to erase memory


Error: failed to erase memory

Thanks.