Kaltura_Client_Exception thrown

Invalid KS "YjNjODI5OTJmZGUwMjNjOGQwZTczYTFkYjZmMDY0MDRiNGMzZjg0MnwxMDE7OzE0OTA0MTU4MDg7MjsxNDkwMzI5NDA4LjUxMDc7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"