dart call c# using gRPC

[Maggie-GH]

Failed to authenticate HTTPS connection. System.Security.Authentication.AuthenticationException: Cannot determine the frame size or a corrupted frame was received.

using below connection option:
options: const ChannelOptions(
credentials: ChannelCredentials.insecure(),
// codecRegistry:
// CodecRegistry(codecs: const [GzipCodec(), IdentityCodec()]),
)

don't know what do i need to do to fix this issue,please help, thanks.