Kaltura_Client_Exception thrown

Invalid KS "NjE3MTc5NDFlNDc5NzJkYjM3ZDVhMWU0ZTE4ZWNiY2QzMTY1MzU4NHwxMDE7OzE0NzUzNTQxODE7MjsxNDc1MjY3NzgxLjk5O0Fub255bW91cztlZGl0Oio=", Error "-1,INVALID_STR"