erorr while running classifier and run_Virifinder

I get the following error message while running PathoFact on the test data

bad escape \s at position 0
Traceback (most recent call last):
  File "/opt/miniconda3/lib/python3.7/sre_parse.py", line 1015, in parse_template
    this = chr(ESCAPES[this][1])
KeyError: '\\s'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "scripts/virulence_prediction.py", line 4, in <module>
    import pandas as pd
  File "/opt/miniconda3/lib/python3.7/site-packages/pandas/__init__.py", line 6, in <module>
    from . import hashtable, tslib, lib
  File "pandas/tslib.pyx", line 3222, in init pandas.tslib
  File "pandas/tslib.pyx", line 3169, in pandas.tslib.TimeRE.__init__
  File "pandas/tslib.pyx", line 3206, in pandas.tslib.TimeRE.pattern
  File "/opt/miniconda3/lib/python3.7/re.py", line 309, in _subx
    template = _compile_repl(template, pattern)
  File "/opt/miniconda3/lib/python3.7/re.py", line 300, in _compile_repl
    return sre_parse.parse_template(repl, pattern)
  File "/opt/miniconda3/lib/python3.7/sre_parse.py", line 1018, in parse_template
    raise s.error('bad escape %s' % this, len(this))
re.error: bad escape \s at position 0

how can I resolve this? thanks