Errors while using kraken-biom

[pdhrati02]

Hi, I used pip install git+http://github.com/smdabdoub/kraken-biom.git Following which I tried kraken-biom on 2 samples for trial: kraken-biom C1C_S92_krak_out.txt C1T1_S39_krak_out.txt and also kraken-biom C1C_S92_krakenreport.txt C1T1_S39_krakenreport.txt

In both cases I ended up getting the following error: TypeError: expected string or bytes-like object

My kraken report file is a mpa style file while the output is standard format.

Any help would be appreciated. Thank you. DP