Kaltura_Client_Exception thrown

Invalid KS "ODMzNjMyMzcyZWM5Mjg4ZWE3ZGJiY2IxMmFkNWE0YzdlNTYzZWU1NXwxMDE7OzE1MDExMzcwMjg7MjsxNTAxMDUwNjI4LjY3ODM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"