Unable to Upload to ST Nucleo F767 Board

I am attempting to start developing with the ST Nucleo F767 board. As a start I thought I would duplicate the steps outlined in the PlatformIO tutorial for the Nucleo F401RE board which worked fine for me. I made the necessary changes to the main.h file to include the correct stmf32f7xx.h file and revised the LED pin/port definitions. It compiles fine but I get the following error when I try to upload the code:

Uploading .pio\build\nucleo_f767zi\firmware.elf
xPack Open On-Chip Debugger 0.12.0-01004-g9ea7f3d64-dirty (2023-01-30-15:04)
Licensed under GNU GPL v2
For bug reports, read
debug_level: 1

srst_only separate srst_nogate srst_open_drain connect_deassert_srst

Error: read version failed
in procedure 'program'
** OpenOCD init failed **
shutdown command invoked

*** [upload] Error 1

I am running under Windows.

Any suggestions would be appreciated.