torchlight appears to be a separate package that I am not familiar with, so you would need to make sure the correct version that your project expects is installed.
Is it possible that you upgraded pip3? If so, it may have upgraded numpy, and there is a bug in numpy v1.19.5: Illegal instruction (core dumped) on import for numpy 1.19.5 on ARM64 · Issue #18131 · numpy/numpy · GitHub
As a workaround, export OPENBLAS_CORETYPE=ARMV8 first.