Kaltura_Client_Exception thrown

Invalid KS "ZjRlMWMxMmUzNzQ4NjFlNWExNjY3MmUwMzIxMTNiZTM3MmRkNzZkOHwxMDE7OzE0NzUzNDI4OTQ7MjsxNDc1MjU2NDk0LjA4NjY7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"