Kaltura_Client_Exception thrown

Invalid KS "OGNiMDZkMTdjMzYxNjc3YjIwZWI1MzVkYTc1ZmIyY2IwMDM0YWU5OHwxMDE7OzE0NzUwNzg4NDk7MjsxNDc0OTkyNDQ5LjAxNjM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"