User Manual says LPC11E68JBD48E is ARM Cortex-M0+ based.
Following is note from NXP Website:
NOTE: MCUXpresso IDE is now recommended for developers using LPC Cortex-M based microcontrollers.
Please confirm that LPC11E68JBD48E is not Cortex-M based ?
Use MCUXpresso. LPC11xxx is a Cortex-M device.