As part of the MCUXpresso IDE v11.0.1 release, we had to make some major changes to our LinkServer debugging mechanism to support the latest silicon revision of the LPC55xx family of devices (revision 1B) and the more secure debug request mechanism required by these parts. Such silicon is supplied on LPC55S69-EVK boards marked Revision A2 (or later) on the board silkscreen.
Read more...
LPC55xx_0A_MCUXIDE_11-0-1-LinkServer-patch.zip