Kaltura_Client_Exception thrown

Invalid KS "ZmNhMjJhNjI1Mzc0NzQ1ZDI5ZDY3ZjRhMzM3Zjc5OGJlNGM3YmJlNXwxMDE7OzE0OTgzNDU2MDM7MjsxNDk4MjU5MjAzLjczMTU7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"