grpc._cython.cygrpc._store_c_metadata ValueError: too many values to unpack

[Ruchika Ahuja]

grpc.io version 1.51.3

protobuf version 4.22.0

File "/lib/python3.9/site-packages/grpc/_channel.py", line 944, in __call__
    state, call, = self._blocking(request, timeout, metadata, credentials,
  File "/lib/python3.9/site-packages/grpc/_channel.py", line 926, in _blocking
    call = self._channel.segregated_call(
  File "src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi", line 496, in grpc._cython.cygrpc.Channel.segregated_call
  File "src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi", line 366, in grpc._cython.cygrpc._segregated_call
  File "src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi", line 360, in grpc._cython.cygrpc._segregated_call
  File "src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi", line 218, in grpc._cython.cygrpc._call
  File "src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi", line 246, in grpc._cython.cygrpc._call
  File "src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi", line 89, in grpc._cython.cygrpc._operate
  File "src/python/grpcio/grpc/_cython/_cygrpc/tag.pyx.pxi", line 64, in grpc._cython.cygrpc._BatchOperationTag.prepare
  File "src/python/grpcio/grpc/_cython/_cygrpc/operation.pyx.pxi", line 37, in grpc._cython.cygrpc.SendInitialMetadataOperation.c
  File "src/python/grpcio/grpc/_cython/_cygrpc/metadata.pyx.pxi", line 41, in grpc._cython.cygrpc._store_c_metadata
ValueError: too many values to unpack (expected 2)