Kaltura_Client_Exception thrown

Invalid KS "ODFhZjc5MjU4Mjk4MmU0OGU2NzgwOTliMzRmMzE4YjUwMTQzYzIyNnwxMDE7OzE0NjcyNjU2NTM7MjsxNDY3MTc5MjUzLjk2MTg7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"