This sounds similar to a few others who are having this issue, which makes me think there's something up.
@ataqdog had I believe the same issue for this version as well.
I don't really know where to start, so my recommendation would be to run the steps from this post:
In particular the linked script will load each plugin in order to figure out what's causing the illegal instruction. You should be able to run it in the broken environment, even if q2cli isn't working.