From submitting the 24 jobs of Step5 simultaneously, I regularly get the error:
File exists: '.../Out_mitoConsensus/temp/sparse_matrices2.0
This is because the jobs are trying to make the folder at the same time.
SOLUTION
I replaced line 56-57 of $mitoConsensus/mitoConsensus.py with
os.makedirs(out_dir+"/temp/sparse_matrices2.0", exist_ok=True)