Kaltura_Client_Exception thrown

Invalid KS "ZjIyNGUxNTg1YjIwOTgwNTBmMWQxMzQ3MzNjNTgwYzI3ZjczMzNhY3wxMDE7OzE0OTg3OTc0OTc7MjsxNDk4NzExMDk3LjU0NDM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"