error when running PAGA

[lixin4306ren]

I used seurat3 object as input and got the following error:

> tmp <- PAGA(s1)
Error in py_call_impl(callable, dots$args, dots$keywords) : 
  Evaluation error: ValueError: Length mismatch: Expected axis has 0 elements, new values have 25339 elements

Detailed traceback: 
  File "/Users/xinli/miniconda3/lib/python3.7/site-packages/pandas/core/generic.py", line 5287, in __setattr__
    return object.__setattr__(self, name, value)
  File "pandas/_libs/properties.pyx", line 67, in pandas._libs.properties.AxisProperty.__set__
  File "/Users/xinli/miniconda3/lib/python3.7/site-packages/pandas/core/generic.py", line 661, in _set_axis
    self._data.set_axis(axis, labels)
  File "/Users/xinli/miniconda3/lib/python3.7/site-packages/pandas/core/internals/managers.py", line 178, in set_axis
    f"Length mismatch: Expected axis has {old_len} elements, new "
.
Called from: py_call_impl(callable, dots$args, dots$keywords)