Conda更新之后出现No module named ‘libarchive’_no module named 'libarchive

(base) MacBook-Pro:downloads name$ conda install -c bioconda cwltool
Traceback (most recent call last):
  File "/Users/anaconda3/lib/python3.7/site-packages/conda/exceptions.py", line 1043, in __call__
    return func(*args, **kwargs)
  File "/Users/anaconda3/lib/python3.7/site-packages/conda/cli/main.py", line 84, in _main
    exit_code = do_call(args, p)
  File "/Users/anaconda3/lib/python3.7/site-packages/conda/cli/conda_argparse.py", line 80, in do_call
    module = import_module(relative_mod, __name__.rsplit('.', 1)[0])
  File "/Users/anaconda3/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File 
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