i'm having issue with google service account, the same about this post Error:"invalid_grant", Description:"Invalid JWT: Token must be a short-lived token and in a reasonable timeframe", Uri:"", and i'm using the same procedure.
I'have checked time synchronization but the problem persists.
I've noticed that after the service is created by
var service = new PlusService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = "CRMpaolo",
});
i can see that no token has been received/created, as the image below
Is there any relation with the problem?