TypeError running the test data

[Pooran Dewari]

Hello,
I have been trying to set up umap but the test run gives me this error:
File "get_kmers.py", line 201, in get_seq_ar
if "chr" in seq_ar[0]:
TypeError: a bytes-like object is required, not 'str'

Command: Just using the recommended commands for the test data run in my conda env with python 2.7

python ubismap.py data/genome.fa data/chrsize.tsv data/TestGenomeMappability all.q $BOWTIEDIR/bowtie-build --kmer 8 12 -write_script test_run.sh

sh test_run.sh

I work on aquaculture species (Atlantic salmon, Rainbow trout), there is no blacklist file available for these, so need to generate afresh. Please suggest how to get around this error. 

Thanks for your help.