Kaltura_Client_Exception thrown

Invalid KS "NjFmYThlNGU0NDY5MWFmMmQ2MGZmYTk5M2Q3Y2RmNTYzMTBhMjI5YXwxMDE7OzE0ODE0NzQxMTU7MjsxNDgxMzg3NzE1Ljg1MDM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"