Kaltura_Client_Exception thrown

Invalid KS "ODk5OWQxOTBmMTg4MTBhY2EzMzMyMjY4NTVkN2FkZDFmMjdiYWY1NHwxMDE7OzE0OTA0MTU1MTg7MjsxNDkwMzI5MTE4LjU1MTg7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"