Kaltura_Client_Exception thrown

Invalid KS "OTc3ZDllNGY5NDVhYjQwY2RkNTk0ODI4OGJlM2FlMTI0OGMyNzhlZnwxMDE7OzE0OTMwMjc2MTg7MjsxNDkyOTQxMjE4LjE0NjQ7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"