RuntimeError: PythonNext() argument read is not valid: Dynamic cast failed about nucleus HOT 4 CLOSED

TypeError                                 Traceback (most recent call last)
<ipython-input-3-36045406c016> in <module>
      8 import numpy as np
      9 
---> 10 from nucleus.io import fasta
     11 from nucleus.io import sam
     12 from nucleus.io import vcf

~/anaconda3/envs/nucleus/lib/python3.8/site-packages/nucleus/io/fasta.py in <module>
     45 from nucleus.io import genomics_reader
     46 from nucleus.io.python import reference
---> 47 from nucleus.protos import fasta_pb2
     48 from nucleus.protos import reference_pb2
     49 from nucleus.util import ranges

~/anaconda3/envs/nucleus/lib/python3.8/site-packages/nucleus/protos/fasta_pb2.py in <module>
     14 
     15 
---> 16 from nucleus.protos import range_pb2 as nucleus_dot_protos_dot_range__pb2
     17 from nucleus.protos import reference_pb2 as nucleus_dot_protos_dot_reference__pb2
     18 

~/anaconda3/envs/nucleus/lib/python3.8/site-packages/nucleus/protos/range_pb2.py in <module>
     34   containing_type=None,
     35   fields=[
---> 36     _descriptor.FieldDescriptor(
     37       name='reference_name', full_name='nucleus.genomics.v1.Range.reference_name', index=0,
     38       number=1, type=9, cpp_type=9, label=1,

~/anaconda3/envs/nucleus/lib/python3.8/site-packages/google/protobuf/descriptor.py in __new__(cls, name, full_name, index, number, type, cpp_type, label, default_value, message_type, enum_type, containing_type, is_extension, extension_scope, options, serialized_options, has_default_value, containing_oneof, json_name, file)
    528                 has_default_value=True, containing_oneof=None, json_name=None,
    529                 file=None):  # pylint: disable=redefined-builtin
--> 530       _message.Message._CheckCalledFromGeneratedFile()
    531       if is_extension:
    532         return _message.default_pool.FindExtensionByName(full_name)

TypeError: Descriptors should not be created directly, but only retrieved from their parent.