Kaltura_Client_Exception thrown

Invalid KS "ZWIzODgyNWE4ZjVmNzBmOTdmY2Q0YjE2ZTJjYzY3MzhlMTY4OTJmN3wxMDE7OzE0ODQ5NTYxMTM7MjsxNDg0ODY5NzEzLjM5NjM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"