I am just running many instances of the same script, so I am not dealing with distributed workers or anything like that.
Using the tip from this thread setting
export JULIA_CPU_TARGET="generic;icelake-server,clone_all"
I got a bit ahead. I still get the warnings I mentioned above, but there is no segmentation fault. I am still waiting for things to finish to see how they turn out.
If things do not go well, I will try to delete the ~/.julia/compiled folder and instantiate again.
Will update soon! Thanks!