Kaltura_Client_Exception thrown

Invalid KS "MmE1ZjdhY2ZhOGFkNmEwODBkYjZjMzA1NmQyZjU1NWM2YmQ4MDNhMnwxMDE7OzE0ODEzMTU3OTc7MjsxNDgxMjI5Mzk3LjY2MzU7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"