Getting 400 error code without specific detail in getInfo Api

[slice-mohit]

I'm getting this error:
DetailedApiRequestError (DetailedApiRequestError(status: 400, message: No error details. HTTP status was: 400.))

when trying to find scopes granted to a user using this code:

    final oauth2Api = Oauth2Api(client);

    final tokenInfo = await oauth2Api.tokeninfo();

    final grantedScopes = tokenInfo.scope;

I verified that the client is not null and I'm fetching it using this package.

This error is very unpredictible and happens once in a while but it's breaking a major flow in our app. Please guide me what I'm doing wrong or how to debug it.