gRPC client request streaming: - "The client reset the request stream."

I am trying to implement request streaming from my python client to my C# server using gRPC.This is my protofile:

    syntax = "proto3";    service PerceiveAPIDataService {      rpc UploadResource (stream UploadResourceRequest) returns (UploadResourceResponse);    }    message UploadResourceRequest {      oneof request_data {        ResourceChunk resource_chunk = 1;        UploadResourceParameters parameters = 2;      }    }    message ResourceChunk {        bytes content = 1;     }    message UploadResourceParameters {        string path = 1;    }

This is my c# implementation:

    public override async Task<UploadResourceResponse> UploadResource(IAsyncStreamReader<UploadResourceRequest> requestStream, ServerCallContext context)    {        if (!await requestStream.MoveNext())        {            throw new RpcException(new Status(StatusCode.FailedPrecondition, "No upload parameters found."));        }        var initialMessage = requestStream.Current;        if (initialMessage.RequestDataCase != UploadResourceRequest.RequestDataOneofCase.Parameters)        {            throw new RpcException(new Status(StatusCode.FailedPrecondition, "First message must contain upload parameters."));        }        var path = initialMessage.Parameters.Path;        if (string.IsNullOrWhiteSpace(path))        {            throw new RpcException(new Status(StatusCode.InvalidArgument, "Upload path is required."));        }        using (var ms = new MemoryStream())        {            while (await requestStream.MoveNext())            {                var chunk = requestStream.Current.ResourceChunk;                if (chunk == null)                {                    continue;  // Skip any messages that are not resource chunks                }                await ms.WriteAsync(chunk.Content.ToByteArray().AsMemory(0, chunk.Content.Length));            }            ms.Seek(0, SeekOrigin.Begin); // Reset memory stream position to the beginning for reading during upload            var uploadResult = await _dataService.UploadResourceAsync(path, ms);            return new UploadResourceResponse { Succeeded = uploadResult.IsSuccessful };        }    }

And this is my python client code:

    def generate_request(self, data: bytearray, next_cloud_path: str) -> Generator:        first_req = perceive_api_data_service_pb2.UploadResourceRequest(            parameters=perceive_api_data_service_pb2.UploadResourceParameters(path=next_cloud_path)        )        yield first_req        print("Sent initial request with path:", next_cloud_path)        chunk_size = 2048        total_chunks = (len(data) + chunk_size - 1) // chunk_size  # Ceiling division to get total number of chunks        print(f"Data size: {len(data)} bytes, chunk size: {chunk_size} bytes, total chunks: {total_chunks}")        for i in range(0, len(data), chunk_size):            chunk = data[i:i+chunk_size]            yield perceive_api_data_service_pb2.UploadResourceRequest(                resource_chunk=perceive_api_data_service_pb2.ResourceChunk(content=chunk)            )            print(f"Sent chunk {((i // chunk_size) + 1)} of {total_chunks}")    async def upload_file(self, data: bytearray, next_cloud_path: str) -> bool:        async with grpc.aio.insecure_channel("localhost:5228") as channel:            stub = perceive_api_data_service_pb2_grpc.PerceiveAPIDataServiceStub(channel)            request_iterator = self.generate_request(data, next_cloud_path)            response = await stub.UploadResource(request_iterator)            return response.succeeded

The error I get on the server is this:

Grpc.AspNetCore.Server.ServerCallHandler: Error: Error when executing service method 'UploadResource'.

System.IO.IOException: The client reset the request stream.at System.IO.Pipelines.Pipe.GetReadResult(ReadResult& result)at System.IO.Pipelines.Pipe.GetReadAsyncResult()

And the error I get on the client is this:

File"C:\Users\user_name\AppData\Local\Programs\Python\Python311\Lib\site-packages\grpc\aio_call.py",line 690, in _conduct_rpcserialized_response = await self._cython_call.stream_unary(^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "src\python\grpcio\grpc_cython_cygrpc/aio/call.pyx.pxi", line 458,in stream_unary File"src\python\grpcio\grpc_cython_cygrpc/aio/callback_common.pyx.pxi",line 166, in _receive_initial_metadata File"src\python\grpcio\grpc_cython_cygrpc/aio/callback_common.pyx.pxi",line 99, in execute_batch asyncio.exceptions.CancelledError

The first message is sent successfully. So the parameters. However, as soon as the server tries to do requestStream.MoveNext(), it throws this error.

I already tried numerous of different solutions, but I cannot find anything that works. Does anyone see where I am making an error?