I am having the same error as this. In my case it is happening when the app is trying to upload a file via Google Cloud Client API.
POST https://www.googleapis.com/oauth2/v4/token
400 Bad Request
Invalid JWT: Token must be a short-lived token and in a reasonable timeframe
How I load the token is reading a service-account json file, and attach it to CURLOPT_HTTPHEADER
in PHP. It did work properly for the past one month, so I am guessing that Google changed the way of authorization.
Has anyone faced & solved this?