Kaltura_Client_Exception thrown

Invalid KS "NjZmZTQ2ZTgxNDU4MDkwNTRhMTgzYTBjOTg1YTJkNjFhMTUyNmUxMHwxMDE7OzE0NzQ4Njk4ODQ7MjsxNDc0NzgzNDg0LjM1Mjg7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"