I have a similar issue with a directory '∫' ('\u222b') containing a file foo.py:

>>> sys.path.insert(0, '\u222b')
>>> import foo
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 1564, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1531, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 586, in _check_name_wrapper
  File "<frozen importlib._bootstrap>", line 1023, in load_module
  File "<frozen importlib._bootstrap>", line 1004, in load_module
  File "<frozen importlib._bootstrap>", line 562, in module_for_loader_wrapper
  File "<frozen importlib._bootstrap>", line 854, in _load_module
  File "<frozen importlib._bootstrap>", line 981, in get_code
  File "<frozen importlib._bootstrap>", line 313, in _call_with_frames_removed
UnicodeEncodeError: 'mbcs' codec can't encode characters in position 0--1: invalid character

(I got this traceback with "python -v")
line 981 contains a call to compile().