{error: {code: 498, message: "Token Invalid.", ...}

[FarrukhZahid]

HI, 

I am currently using ArcGIS Enterprise 11.4 (Portal-Federated Server) with a developer account subscription. When generating a simple basic API key, I repeatedly encounter a white screen. Checking the network reveals error 498. I have attempted this in different environments, yet the issue persists. Although my environment is secured, I am facing this problem on my local machine (Secured Environment) where the portal is installed. Each time, the key appears as an invalid token.

{
"error": {
"code": 498,
"message": "Token Invalid.",
"details": [
"The required authentication information is invalid. The token is either invalid or has expired."
],

[JoshuaBixby]

If the software is consistently telling you the token is invalid, there is likely something wrong with either the credentials or how the token is being generated.  Unless you provide more information about how you setup the "simple basic API key" and how exactly you are using the key to generate a token, there isn't much for anyone to comment on here.

[FarrukhZahid]

I am following this link for API key generation "https://developers.arcgis.com/documentation/security-and-authentication/api-key-authentication/tutor... 

and to test my API key, I am using this simple base map "https://developers.arcgis.com/javascript/latest/tutorials/change-the-basemap-style/"