I’m guessing this is related to an incompatibility with libc++ 16 which we recently fixed. It’s hard to be super sure without a full error from the compiler, but I’m not sure how you can get that out of pystan
A similar issue was reported here
Since it looks like you’re using conda, you can try to manually install an older libcxx (conda install "libcxx<16"), otherwise, we plan on releasing a 2.32.1 release early next week which will include the fix for this.