I have an update on the error message. I am now getting this one
Google.Apis.Auth.OAuth2.Responses.TokenResponseException: Error:"invalid_grant", Description:"", Uri:""
at Google.Apis.Requests.ClientServiceRequest`1.Execute()
at OpenLiveWriter.BlogClient.Clients.GoogleBloggerv3Client.NewPost(String blogId, BlogPost post, INewCategoryContext newCategoryContext, Boolean publish, String& etag, XmlDocument& remotePost)
at OpenLiveWriter.BlogClient.Blog.NewPost(BlogPost post, INewCategoryContext newCategoryContext, Boolean publish)
at OpenLiveWriter.PostEditor.UpdateWeblogAsyncOperation.DoWork()
at OpenLiveWriter.CoreServices.AsyncOperation.InternalStart()