Kaltura_Client_Exception thrown

Invalid KS "ZTlhNWI0ZWQ5ZGQ0YzdkNzBmOGM1MDcyMzhhYTFmNjBkMGViZWE5Y3wxMDE7OzE0OTgyMjA4OTU7MjsxNDk4MTM0NDk1LjMwMTc7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"