Kaltura_Client_Exception thrown

Invalid KS "ODQzOTEzNDE4ZWUwODk2MzFjNTRiMWJkZTBmZTIyMGI0YTQ4NjcwNnwxMDE7OzE0NzQ5NDI4OTI7MjsxNDc0ODU2NDkyLjkwNTc7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"