Traceback (most recent call last):
  File "/home/dslgr/.local/lib/python3.9/site-packages/visidata/threads.py", line 206, in _toplevelTryFunc
    t.status = func(*args, **kwargs)
  File "/home/dslgr/.local/lib/python3.9/site-packages/visidata/sheets.py", line 940, in reload
    for r in vd.Progress(itsource, gerund='loading', total=0):
  File "/home/dslgr/.local/lib/python3.9/site-packages/visidata/threads.py", line 68, in __iter__
    for item in self.iterable:
  File "/home/dslgr/.local/lib/python3.9/site-packages/visidata/loaders/xlsx.py", line 56, in iterload
    yield AttrDict({cell.column_letter:cell for cell in row})
  File "/home/dslgr/.local/lib/python3.9/site-packages/visidata/loaders/xlsx.py", line 56, in <dictcomp>
    yield AttrDict({cell.column_letter:cell for cell in row})
AttributeError: 'EmptyCell' object has no attribute 'column_letter'