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MCU-PLUS-SDK-AM263X: AM2634 : Attempt To Read ROM "Version Number" Raises Data Abort Exception

Part Number: MCU-PLUS-SDK-AM263X

Hello,

The TRM says the ROM Version Number is at address 0x46050940:

Trying to read this address in the debugger fails with the usual ???????

Trying to read this address in an application results in Data Abort of type 'Synchronous External':

Bit 12 is set so this an AXI Slave error described as follows:

1 = AXI Slave error (SLVERR) or unsupported exclusive access caused the abort. Used when the access has
reached the slave successfully, but the slave wishes to return an error condition to the originating master an
error condition to the originating master. (Valid address, but slave is unable to do the requested operation)

What is the reason please that this is a "Valid address, but slave is unable to do the requested operation)"?