metapHlAn biom output conversion (json to hdf5)

Hi there!!!
I want to convert json biom file generated from Metaphlan into hdf5 biom format. I am using the following command and getting the following error.Can you please help me what’s wrong I am doing?

My command:
jsontoh5 ERR037069.fastq.gz.bowtie2out.txt.biom ~/Downloads/xyz.biom

ERROR returned:
Traceback (most recent call last):
File “/home/deep/.local/bin/jsontoh5”, line 11, in
load_entry_point(‘h5json==1.1.3’, ‘console_scripts’, ‘jsontoh5’)()
File “/home/deep/.local/lib/python3.7/site-packages/h5json-1.1.3-py3.7.egg/h5json/jsontoh5/”, line 257, in main
raise Exception(“no root key in input file”)
Exception: no root key in input file