C# Google.Apis.Sheets.v4 Error:"invalid_grant", Description:"Invalid JWT: Token must be a short-lived token

everyone.

I had written a C# project which reads/writes to the google sheet, and it works fine. Recently I had replaced my desktop machine, so moved my program into it. When I started my program, I got the following error.

Google.Apis.Auth.OAuth2.Responses.TokenResponseException
HResult=0x80131500
Message=Error:"invalid_grant", Description:"Invalid JWT: Token must be a short-lived token (60 minutes) and in a reasonable timeframe. Check your iat and exp values in the JWT claim.", Uri:""
Source=Google.Apis.Auth

I thought its credential maybe be wrong because of my new machine. So I had created a new credential file by referring to this site https://www.hardworkingnerd.com/how-to-read-and-write-to-google-sheets-with-c/ (Thank you for your good sharing, Ian)

But I got the same error even with the new credential file.

This is my code:

var credential = GoogleCredential.FromStream(new FileStream(credentialFileName, FileMode.Open)).CreateScoped(Scopes);
_sheetsService = new SheetsService(new BaseClientService.Initializer()
{
    HttpClientInitializer = credential,
    ApplicationName = ApplicationName,
});

...

SpreadsheetsResource.ValuesResource.GetRequest request =
    _sheetsService.Spreadsheets.Values.Get(_spreadsheetId, range);
var response = request.Execute(); // Here, I got the error.

If I use the OAuth-based credentials (I'm sorry, I don't know its exact terminology) such as https://developers.google.com/sheets/api/quickstart/dotnet, then it works fine.

Here is my code using OAuth-based credentials.

UserCredential credential;
using (var stream = new FileStream(credentialFileName, FileMode.Open, FileAccess.Read))
{
    string credPath = "token.json";
    credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
        GoogleClientSecrets.Load(stream).Secrets,
        Scopes,
        "user",
        CancellationToken.None,
        new FileDataStore(credPath, true)).Result;
     Console.WriteLine("Credential file saved to: " + credPath);
}
_sheetsService = new SheetsService(new BaseClientService.Initializer()
{
     HttpClientInitializer = credential,
     ApplicationName = ApplicationName,
});

...

// Rest codes are same

I have been struggling for this error during a half day.

Any help will be appreciated.

Thank you.

This is usually a time issue...

Make sure the clock on your new machine is synced to the correct time.