Kaltura_Client_Exception thrown

Invalid KS "NzEzYmE4Mjg4NmE5MmE4Zjk0OWQxN2I2ZGQwNjhiMWJmNTgwNjdmOXwxMDE7OzE0OTA0MDkwMTc7MjsxNDkwMzIyNjE3LjIwMTI7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"