Kaltura_Client_Exception thrown

Invalid KS "NGFhNDliODVmNzQ0NzJlMTE2NDQyZTIyMDAwZTY2ZGI4MDllYmZmMnwxMDE7OzE0ODE1MTcxMDg7MjsxNDgxNDMwNzA4LjEzNjg7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"