I have installed Marketing Cloud (ExactTarget) PHP SDK, created my App and updated config.php with ClientId and SecretId but when I am running any sample or any other code I get this error
"Caught exception: Unable to validate App Keys(ClientID/ClientSecret) provided.: DateTime::__construct(): It is not safe to rely........"
One thing I have noticed that my App Status in App center is blank.
Is there any one guide me if I am doing anything incorrect.