Kaltura_Client_Exception thrown

Invalid KS "ZTE4N2QyNzY1MWZkN2E4YzU1ODg5NjZkYmI4ZGJiNzgyZDY4YjczN3wxMDE7OzE1MDEwMDAwNzI7MjsxNTAwOTEzNjcyLjYyODg7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"