Kaltura_Client_Exception thrown

Invalid KS "NGEyYTc0MmU0ODNmYzIxMDM0NTg1YWIwNWRmMTRmYWIzNmMzNzQ1NHwxMDE7OzE0OTA0MjMwOTg7MjsxNDkwMzM2Njk4LjU0MDg7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"