Kaltura_Client_Exception thrown

Invalid KS "ZGZhM2Y4ZTdjYTU1YmEzMTg5NjNkMzExOTE2YjU4ZDkyNGU3ZWE4NnwxMDE7OzE0ODgzMjI3NTc7MjsxNDg4MjM2MzU3LjkxMjI7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"