This is confusing, you're mentioning that you're using Grpc.Net.Client, which is the grpc-dotnet implementation of gRPC in C# (and has no native components).
The error "SymFromAddr in dbghelp.dll is not supported for this application type. grpc_csharp_ext.x64.dll calls this API." seems related to the (legacy) gRPC C# implementation from the Grpc.Core nuget package.
If you can use Grpc.Net.Client exclusively (and not rely on Grpc.Core), that should solve your problems.