Kaltura_Client_Exception thrown

Invalid KS "YjE2ZWY0YTY3MmFhZTg3YmQzNzlmNGM5Y2ZmMTZmNmI1ODM3ZjMxZXwxMDE7OzE1MDEwMDA1MDE7MjsxNTAwOTE0MTAxLjgxNTI7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"