My details:
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System FW 5.1.0
SX OS 2.9.5 beta
Error Code: 2144-0001
Oops! Something went wrong.
....
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I have tried using a different boot.dat file (different SXOS) but still get the same error.
I have used a different, brand new SD card, freshly formatted to FAT32, has 3 files on it...