Kaltura_Client_Exception thrown

Invalid KS "OGUwM2JmYjcxM2E2NTUxZDA4Yjc5NjI0MWE2Y2YzODQ5MzI0NWE2N3wxMDE7OzE0OTM0NTMyOTc7MjsxNDkzMzY2ODk3LjMzNjM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"