Kaltura_Client_Exception thrown

Invalid KS "ZTBiNmM1OGQxNjAzNzgxNjNiZTVjMDlmYzA1YzZmMGM0ZmYzNzRhMnwxMDE7OzE0NzUzOTMwOTU7MjsxNDc1MzA2Njk1LjI0ODM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"