convert_results_to_txt failed in igwn-py38 env

Traceback (most recent call last):
  File "/home/vinaya.valsan/virtualenvs/igwn-py38-rapidpe-rift/bin/convert_result_to_txt.py", line 7, in <module>
    exec(compile(f.read(), __file__, 'exec'))
  File "/home/vinaya.valsan/rapidPE/RapidPE_RIFT_Developments/RapidPE-RIFT_fork/rapidpe-rift-pipe/bin/postscripts/convert_result_to_txt.py", line 357, in <module>
    main()
  File "/home/vinaya.valsan/rapidPE/RapidPE_RIFT_Developments/RapidPE-RIFT_fork/rapidpe-rift-pipe/bin/postscripts/convert_result_to_txt.py", line 199, in main
    max_margll = max(margll["margll"])
IndexError: only integers, slices (`:`), ellipsis (`...`), numpy.newaxis (`None`) and integer or boolean arrays are valid indices