Kaltura_Client_Exception thrown

Invalid KS "NDkzMmQ5M2UwODk5ZDcwZThiYjFjZTY0MDE1ZmM2YTU2MzEzNzRmMXwxMDE7OzE0NzU0MzU4NTY7MjsxNDc1MzQ5NDU2LjI1MzI7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"