Arm: standard_init_linux.go:211: exec user process caused "exec format error"

What does “mini racer work on ARM” mean?

I upgraded the machine to 64 bit (arm v8):
Linux raspberrypi 5.4.51-v8+ #1333 SMP PREEMPT Mon Aug 10 16:58:35 BST 2020 aarch64 GNU/Linux

Still getting the above errors.