Greetings, all. I meticulously adhered to the instructions delineated in the tutorial below: How to install B&R Linux [DEBIAN 10 | DEBIAN 11 ] . However, upon proceeding to Step 5—specifically, inserting the USB drive into the APC, rebooting the system, and selecting the USB device for UEFI boot via the boot manager—an issue immediately arose.
For Linux 12 there is newer wiki post.
Thank you for your response. I have now encountered an impasse at this stage: On the target PC, access the boot menu (typically by pressing F2, F5, or DEL immediately after rebooting to enter the BIOS, then navigating to the “Boot Manager”) and select the UEFI boot entry corresponding to the USB flash drive to initiate the boot process. Furthermore, I am facing an additional issue, as illustrated below:
OK, I think it is good.
Successfully installed? Can you share with us a short summary of what to focus on and what you have learned? 
I proceeded to enable SGX within the BIOS, where it had previously been disabled, and the remainder of the tutorial unfolded seamlessly.