bash: line 1: orted: command not found
OpenSSL version mismatch. Built against 30000020, you have 30100010
mpi4py.MPI.Exception: MPI_ERR_SPAWN: could not spawn processes
There are not enough slots available in the system to satisfy the <N> slots
Unidist is just a wrapper for Dask so to get ultimate performance for this backend you should read through Build Understanding section of Dask documentation to get more insights with respect to performance improvements.
Build Understanding