40 Domain Name Not Found Grpc New

Hi i m trying to get my google cloud endpoints project with grpc working with an oauth2 0 authentication provider using googlecredentials.
Domain name not found grpc. E0624 09 29 01 103658 0 t src github grpc workspace csharp ext windows x64 src core ext transport chttp2 client secure secure channel create cc 132. 0 d0401 19 46 58 849935 0 t src. It will be closed automatically if no further update occurs in 7 day.
Domain name not found message. This issue pr has been automatically marked as stale because it has not had any update including commits comments labels milestones etc for 30 days. In this case if an address is specified as a domain name the name is searched among the described server groups and if not found is determined using a resolver.
Failed to create secure subchannel for secure name x x x x yyyy e0624 09 29 01 104377 0 t src github grpc workspace csharp ext windows x64 src core ext transport chttp2 client secure secure.