Many errors

Hi
I am on imac Osx El Capitan.
When i apply in the terminal :
[(base) iMac-de-mar:~ mar$ conda activate myenv
[(myenv) iMac-de-mar:~ mar$ cd /Applications/SpleeterGui
[(myenv) iMac-de-mar:SpleeterGui mar$ spleeter separate -i spleeter/cancion.mp3 -p spleeter:2stems -o output get these errors.
Please how can i solve them?

Traceback (most recent call last):
File "/Users/mar/opt/anaconda3/envs/myenv/bin/spleeter", line 11, in
sys.exit(entrypoint())
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/__main__.py", line 54, in entrypoint
main(sys.argv)
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/__main__.py", line 46, in main
entrypoint(arguments, params)
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/commands/separate.py", line 45, in entrypoint
synchronous=False
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/separator.py", line 228, in separate_to_file
sources = self.separate(waveform, audio_descriptor)
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/separator.py", line 195, in separate
return self._separate_librosa(waveform, audio_descriptor)
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/separator.py", line 173, in _separate_librosa
outputs = self._get_builder().outputs
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/model/__init__.py", line 301, in outputs
self._build_outputs()
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/model/__init__.py", line 476, in _build_outputs
self._outputs = self.masked_stfts
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/model/__init__.py", line 325, in masked_stfts
self._build_masked_stfts()
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/model/__init__.py", line 440, in _build_masked_stfts
for instrument, mask in self.masks.items():
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/model/__init__.py", line 319, in masks
self._build_masks()
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/model/__init__.py", line 423, in _build_masks
instrument_mask = self._extend_mask(instrument_mask)
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/spleeter/model/__init__.py", line 397, in _extend_mask
mask_shape[-1]))
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/tensorflow_core/python/ops/array_ops.py", line 2338, in zeros
output = _constant_if_small(zero, shape, dtype, name)
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/tensorflow_core/python/ops/array_ops.py", line 2295, in _constant_if_small
if np.prod(shape) < 1000:
File "<__array_function__ internals>", line 6, in prod
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/numpy/core/fromnumeric.py", line 3052, in prod
keepdims=keepdims, initial=initial, where=where)
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/numpy/core/fromnumeric.py", line 86, in _wrapreduction
return ufunc.reduce(obj, axis, dtype, out, **passkwargs)
File "/Users/mar/opt/anaconda3/envs/myenv/lib/python3.7/site-packages/tensorflow_core/python/framework/ops.py", line 736, in __array__
" array.".format(self.name))
NotImplementedError: Cannot convert a symbolic Tensor (strided_slice_4:0) to a numpy array.
(myenv