Hello,
could you please check CONFIG SWITCH on your EVB? If you loaded the code into the board using CAN bootloader, you have probably switched microcontroller to the serial boot mode and this is the reason, why you cannot connect using debugger.

For internal boot mode, switch BOOTCFG0 and BOOTCFG1 to 0.
Please see also the link below, which tells, how the image should looks like.
https://community.nxp.com/thread/320166#comment-384300
Regards,
Martin